Container architecture， as an emerging construction form， has great advantages in efficiency， economy and sustainability.   Taking 110 kV outdoor AIS substation as an example, through analyzing the space requirements for all kinds of rooms in the substation, the container building concept is applied to the design of substations, in order to achieve the containerization of buildings in substations. Moreover, the feasibility of container building used for substations is discussed from aspects of the mechanical properties, air conditioning function and materials durability.