The present invention provides a signal sending method and device. The method includes: sending a first discovery reference signal to first user equipment by using a first transmit power and a first transmit period, where the first discovery reference signal is used by the first user equipment for signal quality measurement; sending a second discovery reference signal to second user equipment by using a second transmit power and a second transmit period, where the second discovery reference signal is used by the second user equipment for signal quality measurement; and receiving a first signal measurement result of the first user equipment for the first discovery reference signal, and receiving a second signal measurement result of the second user equipment for the second discovery reference signal.