The invention discloses a device standby circuit, a television standby circuit and a television, which realize a standby control mode that is long lasting, low in cost and good in experience effect. The device standby circuit comprises a signal transmitting and receiving circuit, a comparison circuit, an edge trigger and a switch control circuit; the signal transmitting and receiving circuit comprises a signal transmitter and a signal receiver; a first input end of the comparator circuit is connected with a power supply, a second input end of the comparator circuit is connected with a signal output end of the signal receiver, an output end of the comparator circuit is connected with an input end and a trigger input end of the edge trigger, the output end of the edge trigger is connected with a control end of the switch control circuit, the input end of the switch control circuit is connected with a standby trigger signal source, and the output end of the switch control circuit is connected with a standby control circuit; and when the switch control circuit is turned on, the standby control circuit can receive a standby trigger signal to control the standby or startup of the device.