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