diff --git a/api/v1alpha1/utils.go b/api/v1alpha1/utils.go
index c0152073..cf7e3f29 100644
--- a/api/v1alpha1/utils.go
+++ b/api/v1alpha1/utils.go
@@ -45,3 +45,7 @@ func IsPruneDisabled(obj AnnotationHolder) bool {
 	}
 	return isDisabled
 }
+
+const (
+	EventAnnKeyUserName = "cosmo-workspace.github.io/user"
+)
diff --git a/internal/cmd/user/get_events.go b/internal/cmd/user/get_events.go
index 9381bf1a..d560351b 100644
--- a/internal/cmd/user/get_events.go
+++ b/internal/cmd/user/get_events.go
@@ -10,7 +10,6 @@ import (
 	"google.golang.org/protobuf/types/known/timestamppb"
 	"k8s.io/utils/ptr"
 
-	"github.com/cosmo-workspace/cosmo/api/v1alpha1"
 	"github.com/cosmo-workspace/cosmo/pkg/apiconv"
 	"github.com/cosmo-workspace/cosmo/pkg/cli"
 	"github.com/cosmo-workspace/cosmo/pkg/clog"
@@ -125,7 +124,7 @@ func regarding(v *dashv1alpha1.ObjectReference) string {
 
 func (o *GetEventsOption) GetEventsByKubeClient(ctx context.Context) ([]*dashv1alpha1.Event, error) {
 	c := o.KosmoClient
-	events, err := c.ListEvents(ctx, v1alpha1.UserNamespace(o.UserName))
+	events, err := c.ListEventsForUser(ctx, o.UserName)
 	if err != nil {
 		return nil, err
 	}
diff --git a/internal/controllers/cluster_instance_controller.go b/internal/controllers/cluster_instance_controller.go
index c3630280..ba76513d 100644
--- a/internal/controllers/cluster_instance_controller.go
+++ b/internal/controllers/cluster_instance_controller.go
@@ -51,24 +51,28 @@ func (r *ClusterInstanceReconciler) Reconcile(ctx context.Context, req ctrl.Requ
 	inst.Status.TemplateName = tmpl.Name
 	inst.Status.TemplateResourceVersion = tmpl.ResourceVersion
 
+	eventAnn := map[string]string{
+		cosmov1alpha1.EventAnnKeyUserName: userNameFromOwnerReferences(inst.GetOwnerReferences()),
+	}
+
 	// 1. Build Unstructured objects
 	objects, err := template.BuildObjects(tmpl.Spec, &inst)
 	if err != nil {
-		r.Recorder.Event(&inst, corev1.EventTypeWarning, "BuildFailed", err.Error())
+		r.Recorder.AnnotatedEventf(&inst, eventAnn, corev1.EventTypeWarning, "BuildFailed", "Failed to build manifests from Template: %v", err)
 		return ctrl.Result{}, err
 	}
 
 	// 2. Transform the objects
 	objects, err = transformer.ApplyTransformers(ctx, transformer.AllTransformers(&inst, r.Scheme, tmpl), objects)
 	if err != nil {
-		r.Recorder.Event(&inst, corev1.EventTypeWarning, "BuildFailed", err.Error())
+		r.Recorder.AnnotatedEventf(&inst, eventAnn, corev1.EventTypeWarning, "BuildFailed", "Failed to build resources: %v", err)
 		return ctrl.Result{}, err
 	}
 
 	// 3. Reconcile objects
 	if errs := r.impl.reconcileObjects(ctx, &inst, objects); len(errs) != 0 {
 		for _, err := range errs {
-			r.Recorder.Event(&inst, corev1.EventTypeWarning, "SyncFailed", err.Error())
+			r.Recorder.AnnotatedEventf(&inst, eventAnn, corev1.EventTypeWarning, "SyncFailed", "Failed to sync objects: %v", err)
 		}
 		// requeue
 		return ctrl.Result{}, fmt.Errorf("apply child objects failed: %w", errs[0])
diff --git a/internal/controllers/instance_controller.go b/internal/controllers/instance_controller.go
index c5cbce58..0d7672b0 100644
--- a/internal/controllers/instance_controller.go
+++ b/internal/controllers/instance_controller.go
@@ -112,6 +112,17 @@ type instanceReconciler struct {
 	FieldManager string
 }
 
+func (r *instanceReconciler) Eventf(inst cosmov1alpha1.InstanceObject, eventtype, reason, messageFmt string, args ...any) {
+	if inst.GetScope() == meta.RESTScopeRoot {
+		ann := map[string]string{
+			cosmov1alpha1.EventAnnKeyUserName: userNameFromOwnerReferences(inst.GetOwnerReferences()),
+		}
+		r.Recorder.AnnotatedEventf(inst, ann, eventtype, reason, messageFmt, args...)
+	} else {
+		r.Recorder.Eventf(inst, eventtype, reason, messageFmt, args...)
+	}
+}
+
 func (r *instanceReconciler) reconcileObjects(ctx context.Context, inst cosmov1alpha1.InstanceObject, objects []unstructured.Unstructured) []error {
 	log := clog.FromContext(ctx).WithCaller()
 	errs := make([]error, 0)
@@ -162,7 +173,7 @@ func (r *instanceReconciler) reconcileObjects(ctx context.Context, inst cosmov1a
 				if err != nil {
 					errs = append(errs, fmt.Errorf("failed to create resource: kind = %s name = %s: %w", built.GetKind(), built.GetName(), err))
 				} else {
-					r.Recorder.Eventf(inst, corev1.EventTypeNormal, "Synced", "%s %s created", built.GetKind(), built.GetName())
+					r.Eventf(inst, corev1.EventTypeNormal, "Synced", "%s %s is created", built.GetKind(), built.GetName())
 				}
 				currAppliedMap[created.GetUID()] = unstToObjectRef(created)
 
@@ -190,7 +201,7 @@ func (r *instanceReconciler) reconcileObjects(ctx context.Context, inst cosmov1a
 				if _, err := r.apply(ctx, &built, r.FieldManager); err != nil {
 					errs = append(errs, fmt.Errorf("failed to apply resource %s %s: %w", built.GetKind(), built.GetName(), err))
 				} else {
-					r.Recorder.Eventf(inst, corev1.EventTypeNormal, "Synced", "%s %s is not desired state, synced", built.GetKind(), built.GetName())
+					r.Eventf(inst, corev1.EventTypeNormal, "Synced", "%s %s is not desired state, synced", built.GetKind(), built.GetName())
 				}
 			}
 		}
@@ -203,10 +214,10 @@ func (r *instanceReconciler) reconcileObjects(ctx context.Context, inst cosmov1a
 		for _, d := range shouldDeletes {
 			if skip, err := prune(ctx, r.Client, d); err != nil {
 				log.Error(err, "failed to delete unused obj", "pruneAPIVersion", d.APIVersion, "pruneKind", d.Kind, "pruneName", d.Name, "pruneNamespace", d.Namespace)
-				r.Recorder.Eventf(inst, corev1.EventTypeWarning, "GCFailed", "failed to delete unused obj: kind=%s name=%s namespace=%s", d.Kind, d.Name, d.Namespace)
+				r.Eventf(inst, corev1.EventTypeWarning, "GCFailed", "Failed to delete unused obj: kind=%s name=%s namespace=%s", d.Kind, d.Name, d.Namespace)
 			} else if !skip {
 				log.Info("deleted unmanaged object", "apiVersion", d.APIVersion, "kind", d.Kind, "name", d.Name, "namespace", d.Namespace)
-				r.Recorder.Eventf(inst, corev1.EventTypeNormal, "GC", "deleted unmanaged object: kind=%s name=%s namespace=%s", d.Kind, d.Name, d.Namespace)
+				r.Eventf(inst, corev1.EventTypeNormal, "GC", "Deleted unmanaged object: kind=%s name=%s namespace=%s", d.Kind, d.Name, d.Namespace)
 			}
 		}
 	}
diff --git a/internal/controllers/template_controller.go b/internal/controllers/template_controller.go
index 2d21f6cf..efe952e3 100644
--- a/internal/controllers/template_controller.go
+++ b/internal/controllers/template_controller.go
@@ -6,6 +6,7 @@ import (
 
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/equality"
+	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/tools/record"
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -93,7 +94,15 @@ func notifyUpdateToInstances(ctx context.Context, c client.Client, rec record.Ev
 		if err := c.Status().Update(ctx, inst); err != nil {
 			errs = append(errs, fmt.Errorf("failed to update instance status: %s: %w", inst.GetName(), err))
 		}
-		rec.Eventf(inst, corev1.EventTypeNormal, "TemplateUpdated", "Detected Template %s is updated", tmpl.GetName())
+
+		if inst.GetScope() == meta.RESTScopeRoot {
+			ann := map[string]string{
+				cosmov1alpha1.EventAnnKeyUserName: userNameFromOwnerReferences(inst.GetOwnerReferences()),
+			}
+			rec.AnnotatedEventf(inst, ann, corev1.EventTypeNormal, "TemplateUpdated", "Detected Template %s is updated", tmpl.GetName())
+		} else {
+			rec.Eventf(inst, corev1.EventTypeNormal, "TemplateUpdated", "Detected Template %s is updated", tmpl.GetName())
+		}
 	}
 	return errs
 }
diff --git a/internal/controllers/user_controller.go b/internal/controllers/user_controller.go
index a5f4b575..f14a68bb 100644
--- a/internal/controllers/user_controller.go
+++ b/internal/controllers/user_controller.go
@@ -8,6 +8,7 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/equality"
 	apierrs "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/client-go/tools/record"
@@ -206,3 +207,12 @@ func (r *UserReconciler) patchNamespaceToUserDesired(ns *corev1.Namespace, user
 
 	return nil
 }
+
+func userNameFromOwnerReferences(refs []metav1.OwnerReference) string {
+	for _, ref := range refs {
+		if ref.Kind == "User" {
+			return ref.Name
+		}
+	}
+	return ""
+}
diff --git a/internal/dashboard/user_handler.go b/internal/dashboard/user_handler.go
index e2858e8c..57ebb3c7 100644
--- a/internal/dashboard/user_handler.go
+++ b/internal/dashboard/user_handler.go
@@ -101,9 +101,9 @@ func (s *Server) GetUser(ctx context.Context, req *connect_go.Request[dashv1alph
 	if err != nil {
 		return nil, ErrResponse(log, err)
 	}
-	events, err := s.Klient.ListEvents(ctx, cosmov1alpha1.UserNamespace(user.Name))
+	events, err := s.Klient.ListEventsForUser(ctx, user.Name)
 	if err != nil {
-		log.Error(err, "failed to list events", "namespace", cosmov1alpha1.UserNamespace(user.Name))
+		log.Error(err, "failed to list events", "user", user.Name)
 	}
 
 	res := &dashv1alpha1.GetUserResponse{
diff --git a/pkg/kosmo/event.go b/pkg/kosmo/event.go
index 1e6da16c..0224916f 100644
--- a/pkg/kosmo/event.go
+++ b/pkg/kosmo/event.go
@@ -8,6 +8,7 @@ import (
 	apierrs "k8s.io/apimachinery/pkg/api/errors"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
+	cosmov1alpha1 "github.com/cosmo-workspace/cosmo/api/v1alpha1"
 	"github.com/cosmo-workspace/cosmo/pkg/clog"
 )
 
@@ -21,3 +22,31 @@ func (c *Client) ListEvents(ctx context.Context, namespace string) ([]eventsv1.E
 		return events.Items, nil
 	}
 }
+
+func (c *Client) ListEventsForUser(ctx context.Context, user string) ([]eventsv1.Event, error) {
+	ns := cosmov1alpha1.UserNamespace(user)
+
+	// List events in user namespace
+	userEvents, err := c.ListEvents(ctx, ns)
+	if err != nil {
+		return nil, err
+	}
+
+	// List events in default namespace which is annotated user name
+	// cluster scoped events are found in defualt namespace
+	var defaultEvents eventsv1.EventList
+	if err := c.List(ctx, &defaultEvents, &client.ListOptions{Namespace: "default"}); err != nil {
+		return nil, apierrs.NewInternalError(fmt.Errorf("failed to list Event in default namespace: %w", err))
+	}
+	for _, e := range defaultEvents.Items {
+		if e.Annotations == nil {
+			continue
+		}
+		if e.Annotations[cosmov1alpha1.EventAnnKeyUserName] == user {
+			userEvents = append(userEvents, e)
+		}
+	}
+
+	return userEvents, nil
+
+}