The CR4000 closed cloud cabinet is equipped with the microenvironment system, power supply and distribution system and cooling system, which can collect the operating conditions in the cabinet in real time, and has the ability of centralized monitoring and remote management of multiple nodes and outlets, realizing the deployment requirements of "one cabinet and one center". It is suitable for small and medium-sized enterprises without the basic environment of the equipment room, which can solve the problems of customers without the basic environment, and ensure the complete operation of the hardware equipment system. The cabinet adopts the front and rear integrated welding cabinets, which can achieve higher static load.