The invention provides a sensor identification method, a host computer, a sensor and a sensor identification system. A connection request is received, and the connection request is sent when a sensor is accessed and comprises the identification information of the sensor; and identification verification is carried out on the sensor, and based on an identification verification result, whether the sensor is successfully accessed is determined, so that the plug-and-play of the sensor is realized, and the advantages include quite good accuracy, rapid response speed and quite high reliability.