An uplink control method, includes: determining a downlink path loss based on a first reference signal receive power that is of a serving cell in which the terminal device is located and that is obtained through measurement; receiving a first transmit power and a second transmit power that are sent by the base station; and if the first reference signal receive power is greater than or equal to a preset threshold, obtaining, by the terminal, an uplink transmit power of the terminal in a first network; or if the first reference signal receive power is less than a preset threshold, obtaining, by the terminal, an uplink transmit power of the terminal in the first network.