Disclosed is a smart farm system comprising: a Rankine cycle in which a first fluid passes through a pump, an evaporator, a turbine, and a condenser along a first circulation line; a heating unit configured to exchange heat with the evaporator; a valve unit which is provided between the turbine and the condenser, and configured to run the first fluid to the condenser when the temperature of the first fluid at the outlet of the turbine is a first temperature, and to bypass the first fluid to a bypass line when the temperature of the first fluid at the outlet of the turbine is a second temperature higher than the first temperature; and a smart farm configured to exchange heat with the first fluid and the heating unit via the condenser or the bypass line.