The invention discloses a power control method acting on a second device, and the method comprises the following specific steps: receiving transmission service indication information configured by a first device, the indication information being used for indicating the service type of communication between the second device and a third device, and being used for indicating whether a transmission service is a broadcast, multicast or multicast service;, and the indication information displays an indication through wireless resource control or downlink control information, or an implicit indication through a wireless network temporary identifier in DCI; receiving a power control parameter configured by the first device; and based on the power control parameter, calculating transmission powerof communication between the second device and the third device. The method is suitable for communication scenes between devices in the future, accurate power control can be achieved, interference between the devices is avoided, and the transmission rate and the coverage performance are improved.