Equipment cabinet of modular data center and modular data center

The invention relates to the technical field of electronic equipment and provides an equipment cabinet and a modular data center. The equipment cabinet comprises a top plate, a bottom plate, and multiple side plates. The multiple side plates cooperate with the top plate and the bottom plate so that the equipment cabinet with box structure is formed. A receiving space is arranged in the equipment cabinet and is used for receiving a functional module. The multiple side plates comprise a first side plate and a second side plate which are arranged oppositely. Along the direction from the first side plate to the second side plate, a ventilating channel is formed at least one side of the receiving space. A position, used for forming the ventilating channel, of at least one of the others of the multiple side plates is provided with a ventilation opening that can be opened or closed. By opening the ventilation openings on corresponding side plates of the equipment cabinet, the ventilating channel formed in the equipm