Hi @JIHOON, welcome to the forum 
What code are you running, and how have you set up/connected your power supply, Raspberry Pi, ESCs, and thrusters? If you explain/show what you’ve tried so far then we can try to help you determine which components aren’t set up correctly or need to be changed
The RPi.GPIO library may not be precise enough to correctly run our ESCs, so it’s suggested to use a hardware-focused library like PiGPIO. See this post for details:
If you’re interested in a more abstracted library you can use GPIOZero around PiGPIO, as I discuss in this comment, but it’s not a requirement.