Abstract: A power distribution method suitable for a server system is provided. In the method, an average power is respectively supplied to activated motherboards, an expected power of each activated motherboard is read, and the expected power and the average power are compared, where if the expected power is greater than the average power, a first state is defined, and if the expected power is less than the average power, a second state is defined. Then, the expected powers of the motherboards defined as the second state and the average power are calculated to obtain a first remaining power. Then the first remaining power is averagely distributed to the motherboards defined as the first state. This method is capable of dynamically distributing power according to the needs of each of the motherboards and providing sufficient powers to the motherboards for operation.