A controlling method for connector is provided, which includes: receiving a first signal stream under a condition that a squelch detector is turned-off; determining whether the first signal stream contains a burst signal under a first operating frequency; if the first signal stream contains the burst signal, turning on the squelch detector and determining by the squelch detector under a second operating frequency whether a second signal stream is a waking signal, wherein the second signal stream is received after receiving the first signal stream and the second operating frequency is greater than the first operating frequency. The controlling method further includes: if the second signal stream is the waking signal, changing an operating state of the connector to an active state. In this way, the power consumption of the connector is reduced.