Expandable data center

A method for deploying a data center, comprising:

• providing a first movable container;
• providing a second movable container coupling with the first movable container, wherein the size of the second movable container is less than that of the first movable container, so that the second movable container is adapted to be moved into the first movable container;
• disposing a plurality of racks within the first movable container and the second movable container, wherein each of the rack has a plurality of rack shelves;
• disposing a plurality of sensors within the first movable container and the second movable container for sensing one or more environmental conditions in the first movable container and. the second movable container, respectively;
• gathering the environmental conditions and comparing the environmental conditions with prior environmental conditions data to generate a control signal;
• and
• providing a movable chassis in at least one of the rack shelves, wherein the chassis is controlled to move up or down in response to the control signal.