Download ADB from https://developer.android.com/studio/command-line/adb.html


1.run cmd commend and go to the adb save folder that connect to device via Adb over TCP, if use Adb wire, skip this step

    adb connect {ip} for example:  adb connect 192.168.2.112


2. Take screen shot and save to device

    adb shell screencap -p /sdcard/0.png


3. Take the image from device to PC, 0.png would save to the current folder

    adb pull /sdcard/0.png