Provided is a container capable of raising a temperature of a liquid hydrogen pump during maintenance and a system including such a container. Provided is a maintenance system used for maintenance of a liquid hydrogen pump, the maintenance system including: a hollow container main body that allows a liquid hydrogen pump to pass through during maintenance, the container main body having one or more inlets and one outlet; a circulation flow path that connects the outlet and the one or more inlets; a blower that is provided on the circulation flow path and guides helium gas from the outlet to the one or more inlets to circulate the helium gas in the circulation flow path; and a heat exchanger that raises a temperature of the helium gas passing through the circulation flow path by atmosphere.