diff --git a/harmonyos-build-deploy/SKILL.md b/harmonyos-build-deploy/SKILL.md
index 1b9987b..b825e3d 100644
--- a/harmonyos-build-deploy/SKILL.md
+++ b/harmonyos-build-deploy/SKILL.md
@@ -36,9 +36,12 @@ Complete workflow for building, cleaning, packaging, and installing HarmonyOS ap
 hvigorw assembleApp --mode project -p product=default -p buildMode=release --no-daemon
 
 # Install to device (check actual output path in your project)
-hdc -t <UDID> shell "rm -rf /data/local/tmp/install && mkdir -p /data/local/tmp/install"
-hdc -t <UDID> file send <output_path>/signed /data/local/tmp/install
-hdc -t <UDID> shell "bm install -p /data/local/tmp/install/signed"
+# Use a random directory name to avoid conflicts with previous installations
+INSTALL_DIR="/data/local/tmp/install_$(date +%s)"
+hdc -t <UDID> shell "mkdir -p $INSTALL_DIR"
+hdc -t <UDID> file send <output_path>/signed $INSTALL_DIR
+hdc -t <UDID> shell "bm install -p $INSTALL_DIR/signed"
+hdc -t <UDID> shell "rm -rf $INSTALL_DIR"
 ```
 
 **Note:** Build output path varies by project. Common paths:
@@ -61,9 +64,11 @@ Delegate to subagent with the following steps:
 4. Find build output (check `outputs/default/signed/` or `outputs/project/bundles/signed/`)
 5. Deploy to device:
    ```bash
-   hdc -t <UDID> shell "rm -rf /data/local/tmp/install && mkdir -p /data/local/tmp/install"
-   hdc -t <UDID> file send <output_path>/signed /data/local/tmp/install
-   hdc -t <UDID> shell "bm install -p /data/local/tmp/install/signed"
+   INSTALL_DIR="/data/local/tmp/install_$(date +%s)"
+   hdc -t <UDID> shell "mkdir -p $INSTALL_DIR"
+   hdc -t <UDID> file send <output_path>/signed $INSTALL_DIR
+   hdc -t <UDID> shell "bm install -p $INSTALL_DIR/signed"
+   hdc -t <UDID> shell "rm -rf $INSTALL_DIR"
    ```
 6. Launch: `hdc -t <UDID> shell "aa start -a EntryAbility -b <bundleName>"`
 7. Report success/failure with details
@@ -75,9 +80,11 @@ Delegate to subagent with the following steps:
 1. Read `AppScope/app.json5` to get bundleName
 2. Push existing build output to device:
    ```bash
-   hdc -t <UDID> shell "rm -rf /data/local/tmp/install && mkdir -p /data/local/tmp/install"
-   hdc -t <UDID> file send <output_path>/signed /data/local/tmp/install
-   hdc -t <UDID> shell "bm install -p /data/local/tmp/install/signed"
+   INSTALL_DIR="/data/local/tmp/install_$(date +%s)"
+   hdc -t <UDID> shell "mkdir -p $INSTALL_DIR"
+   hdc -t <UDID> file send <output_path>/signed $INSTALL_DIR
+   hdc -t <UDID> shell "bm install -p $INSTALL_DIR/signed"
+   hdc -t <UDID> shell "rm -rf $INSTALL_DIR"
    ```
 3. Launch: `hdc -t <UDID> shell "aa start -a EntryAbility -b <bundleName>"`
 4. Report success/failure with details
@@ -249,14 +256,18 @@ hdc -t <UDID> shell "whoami"  # Test connection
 ### Push and Install
 
 ```bash
-# Clear device directory
-hdc -t <UDID> shell "rm -rf /data/local/tmp/install && mkdir -p /data/local/tmp/install"
+# Create random temp directory on device
+INSTALL_DIR="/data/local/tmp/install_$(date +%s)"
+hdc -t <UDID> shell "mkdir -p $INSTALL_DIR"
 
 # Push signed bundles
-hdc -t <UDID> file send path/to/signed /data/local/tmp/install
+hdc -t <UDID> file send path/to/signed $INSTALL_DIR
 
 # Install all HAP/HSP in directory
-hdc -t <UDID> shell "bm install -p /data/local/tmp/install/signed"
+hdc -t <UDID> shell "bm install -p $INSTALL_DIR/signed"
+
+# Clean up temp directory
+hdc -t <UDID> shell "rm -rf $INSTALL_DIR"
 ```
 
 ### Verify and Launch
diff --git a/harmonyos-build-deploy/references/device-installation.md b/harmonyos-build-deploy/references/device-installation.md
index 4aa9a62..5e98525 100644
--- a/harmonyos-build-deploy/references/device-installation.md
+++ b/harmonyos-build-deploy/references/device-installation.md
@@ -61,20 +61,24 @@ If no device found:
 ### Step 2: Push Files to Device
 
 ```bash
-# Clear and create installation directory on device
-hdc -t <UDID> shell "rm -rf /data/local/tmp/app_install && mkdir -p /data/local/tmp/app_install"
+# Create random temp directory on device
+INSTALL_DIR="/data/local/tmp/install_$(date +%s)"
+hdc -t <UDID> shell "mkdir -p $INSTALL_DIR"
 
 # Push signed HAP/HSP files
-hdc -t <UDID> file send outputs/default/signed /data/local/tmp/app_install
+hdc -t <UDID> file send outputs/default/signed $INSTALL_DIR
 ```
 
 ### Step 3: Install Application
 
 ```bash
 # Install all HAP/HSP from directory
-hdc -t <UDID> shell "bm install -p /data/local/tmp/app_install/signed"
+hdc -t <UDID> shell "bm install -p $INSTALL_DIR/signed"
 
 # Expected output: "install bundle successfully."
+
+# Clean up temp directory
+hdc -t <UDID> shell "rm -rf $INSTALL_DIR"
 ```
 
 ### Step 4: Verify and Launch
@@ -98,7 +102,7 @@ Save as `install.sh` (Linux/macOS) or run with Git Bash on Windows:
 DEVICE_ID="${1:-$(hdc list targets | head -1)}"
 SIGNED_PATH="${2:-outputs/default/signed}"
 BUNDLE_NAME="${3:-}"
-REMOTE_PATH="/data/local/tmp/app_install"
+REMOTE_PATH="/data/local/tmp/install_$(date +%s)"
 
 if [ -z "$DEVICE_ID" ]; then
     echo "Error: No device found. Connect a device or specify UDID as first argument."
@@ -107,9 +111,10 @@ fi
 
 echo "Device: $DEVICE_ID"
 echo "Source: $SIGNED_PATH"
+echo "Remote: $REMOTE_PATH"
 
-# === Clear remote directory ===
-hdc -t "$DEVICE_ID" shell "rm -rf $REMOTE_PATH && mkdir -p $REMOTE_PATH"
+# === Create remote directory ===
+hdc -t "$DEVICE_ID" shell "mkdir -p $REMOTE_PATH"
 
 # === Push signed files ===
 hdc -t "$DEVICE_ID" file send "$SIGNED_PATH" "$REMOTE_PATH"
@@ -118,6 +123,9 @@ hdc -t "$DEVICE_ID" file send "$SIGNED_PATH" "$REMOTE_PATH"
 BASENAME="$(basename "$SIGNED_PATH")"
 hdc -t "$DEVICE_ID" shell "bm install -p $REMOTE_PATH/$BASENAME"
 
+# === Clean up ===
+hdc -t "$DEVICE_ID" shell "rm -rf $REMOTE_PATH"
+
 echo ""
 echo "Installation complete!"