A combination of a laser safety inspection apparatus and an inspection protective device which accommodates the laser safety inspection apparatus, said combination being characterized in that the protective device comprises: a sliding door and a housing, wherein the housing and the sliding door together define a closed chamber; and a guide rail provided on the housing, wherein the sliding door is slidable along the guide rail to open or close the chamber, wherein the sliding door is provided with a sensor and the housing is provided with a sense switch, wherein the sensor is configured to trigger the sense switch to send a first signal when the chamber is closed, wherein when the laser safety inspection apparatus receives said first signal from the sense switch, the laser safety inspection apparatus determines that the chamber has been closed and then emits visible laser or infrared laser; and wherein the sensor is further configured to trigger the sense switch to send a second signal when the chamber is opened, wherein when the safety inspection apparatus receives said second signal from the sense switch, the laser safety inspection apparatus determines that the chamber has been opened and then emits no more visible laser or infrared laser, wherein the sliding door is provided with a first locking element and the housing is provided with a second locking element, and wherein the protective device further comprises an electromagnetic unit, wherein the electromagnetic unit is configured to apply an electromagnetic force to lock the first locking element and the second locking element with each other when the chamber is closed; and wherein the electromagnetic unit is further configured to remove the electromagnetic force applied on the first locking element and the second locking element upon receipt of a third signal from the safety inspection apparatus when the chamber is to be opened. a sliding door and a housing, wherein the housing and the sliding door together define a closed chamber; and a guide rail provided on the housing, wherein the sliding door is slidable along the guide rail to open or close the chamber, wherein the sliding door is provided with a sensor and the housing is provided with a sense switch, wherein the sensor is configured to trigger the sense switch to send a first signal when the chamber is closed, wherein when the laser safety inspection apparatus receives said first signal from the sense switch, the laser safety inspection apparatus determines that the chamber has been closed and then emits visible laser or infrared laser; and wherein the sensor is further configured to trigger the sense switch to send a second signal when the chamber is opened, wherein when the safety inspection apparatus receives said second signal from the sense switch, the laser safety inspection apparatus determines that the chamber has been opened and then emits no more visible laser or infrared laser, wherein the sliding door is provided with a first locking element and the housing is provided with a second locking element, and wherein the protective device further comprises an electromagnetic unit, wherein the electromagnetic unit is configured to apply an electromagnetic force to lock the first locking element and the second locking element with each other when the chamber is closed; and wherein the electromagnetic unit is further configured to remove the electromagnetic force applied on the first locking element and the second locking element upon receipt of a third signal from the safety inspection apparatus when the chamber is to be opened.