An automatic regulating system for regulation of liquid pressure includes a container, a tubing connected between the human tissue and the container, a switch unit controllable to switch between first and second states, a pressure sensor for measuring liquid pressure in the human tissue, a level sensor for detecting a liquid level in the container, and a control module controlling switching of the switch unit according to the liquid pressure and the liquid level detection. Fluid communication between the human tissue and the container is prevented in the first state but is permitted in the second state. Fluid communication between the human tissue and the pressure sensor is permitted in the first state but is prevented in the second state.
