A container data center includes a mobile container and a number of server systems. The mobile container includes a bottom wall, an inner container portion and an outer container portion. The inner container portion includes a first top wall opposite to the bottom wall, and a number of first sidewalls connected between the first top wall and the bottom wall. The outer container portion includes a second top wall facing the bottom wall, and a number of second sidewalls connected between the second top wall and the bottom wall. The second sidewalls surround the inner container portion. A passage is formed between the first and second top walls and between the first and second sidewalls. The second top wall and the second sidewalls define a number of through holes. The server systems are installed in the inner container portion.