A fuel cell having a temperature-humidity controller comprising a fuel supply unit for supplying a certain rate of fuel, a stack unit for generating electricity and heat according to an electrochemical reaction between the fuel supplied from the fuel supply unit and oxygen, a heat exchanger for dividing a by-product generated from the stack unit into gas and liquid to be re-circulated, and a temperature-humidity controller for controlling temperature and humidity of indoor areas by introducing the gas divided in the heat exchanger into the indoor areas.