An uplink power control method and an device is provided. The uplink power control method includes: sending a configured measurement pilot, wherein the measurement pilot is corresponding to information about a precoding matrix; and sending a configured power control parameter, wherein the power control parameter is corresponding to the configured measurement pilot, and the power control parameter is used to control transmit power of a terminal device in a serving cell. According to the embodiments of the present invention, accuracy of uplink power control is improved.