In a method for improving call performance of a mobile device, the strength of received signals is sent to a base station when the mobile device receives signals from the base station. The method obtains a path balance value sent by the base station, and determines whether the path balance value is greater than a predefined threshold value. The path balance value is obtained according to the strength of the received signals of the mobile device and an emission intensity of the mobile device. When the path balance value is greater than the predefined threshold value, the method obtains a transmitting power of the mobile device, and increases the transmitting power of the mobile device according to the path balance value to improve call performance of the mobile device.