PROBLEM TO BE SOLVED: To provide a clean system that is improved in usability by providing a storage room for an incubator used in a work room of a clean bench, in a clean bench of the clean system, and enables the incubator to be taken out of and in the storage room.SOLUTION: A clean system is provided with a clean bench and an incubator storage room storing an incubator communicating with a work room, on a side face of either right or left work rooms of the clean bench. A slide rail is installed in the incubator storage room, and the incubator is made movable by using the slide rail between the work room and incubator storage room. Further, the incubator is placed on a turntable installed in the work room, and its position can be adjusted so that an operator can easily use the incubator.