Provided are an electronic switch (100), equipment control system and control host (400). The electronic switch (100) comprises: a switch module (130) connected in series with a circuit to close or open the circuit; an instruction receiving module (120) connected with the switch module (130) to control the switch module (130) to close or open according to a switch instruction; a wireless power supply receiving module (110) electrically connected with the instruction receiving module (120) to convert a received electromagnetic wave into electric energy and provide the electric energy to the instruction receiving module (120) as the working electric energy of the instruction receiving module (120). Wireless power supply is adopted to maintain the operation of the electronic switch (100) and the wireless supplied electric energy will not affect equipment in the circuit where the electronic switch (100) is located; therefore, energy consumption is reduced; furthermore, the reduction of service life of the equipme
