A refrigerant control system for controlling a refrigerant flowing in a circulation flow path connected to a compression section and circulating the refrigerant compressed by the compression section so as to exchange heat between the refrigerant and a cooling object, the refrigerant control system comprising: a storage section which stores the refrigerant; a first pipe which is connected to an outlet side pipe constituting the circulation flow path and located on an outlet side of the compression section, one end of the first pipe being accommodated inside the storage section, and the first pipe allowing the refrigerant in the outlet side pipe to flow into the storage section through the one end of the first pipe; a second pipe which is connected to an inlet side pipe constituting the circulation flow path and located on an inlet side of the compression section, one end of the second pipe being accommodated inside the storage section, and the second pipe allowing the refrigerant in the storage section to flow into the inlet side pipe through the one end of the second pipe; a third pipe which is connected to the inlet side pipe and is formed so that heat of the third pipe lower than heat of the outlet side pipe is able to be transferred to the refrigerant in the storage section; a first opening and closing valve which is provided in the first pipe and switches whether or not to allow the refrigerant in the outlet side pipe to flow into the storage section; a second opening and closing valve which is provided in the second pipe and switches whether or not to allow the refrigerant in the storage section to flow into the inlet side pipe; a third opening and closing valve which is provided in the third pipe and switches whether or not to allow the refrigerant in an upstream part in relation to the storage section in the third pipe to flow into a part on the side of the storage section in the third pipe; characterized by a fourth pipe which is connected to the outlet side pipe and is formed so that heat of the fourth pipe higher than heat of the third pipe is able to be transferred to the refrigerant in the storage section; and a fourth opening and closing valve which is provided in the fourth pipe and switches whether or not to allow the refrigerant in an upstream part in relation to the storage section in the fourth pipe to flow into a part on the side of the storage section in the fourth pipe, wherein the opening and closing control section performs opening and closing control of the first opening and closing valve, the second opening and closing valve, the third opening and closing valve, and the fourth opening and closing valve on the basis of the set temperature of the cooling object. a storage section which stores the refrigerant; a first pipe which is connected to an outlet side pipe constituting the circulation flow path and located on an outlet side of the compression section, one end of the first pipe being accommodated inside the storage section, and the first pipe allowing the refrigerant in the outlet side pipe to flow into the storage section through the one end of the first pipe; a second pipe which is connected to an inlet side pipe constituting the circulation flow path and located on an inlet side of the compression section, one end of the second pipe being accommodated inside the storage section, and the second pipe allowing the refrigerant in the storage section to flow into the inlet side pipe through the one end of the second pipe; a third pipe which is connected to the inlet side pipe and is formed so that heat of the third pipe lower than heat of the outlet side pipe is able to be transferred to the refrigerant in the storage section; a first opening and closing valve which is provided in the first pipe and switches whether or not to allow the refrigerant in the outlet side pipe to flow into the storage section; a second opening and closing valve which is provided in the second pipe and switches whether or not to allow the refrigerant in the storage section to flow into the inlet side pipe; a third opening and closing valve which is provided in the third pipe and switches whether or not to allow the refrigerant in an upstream part in relation to the storage section in the third pipe to flow into a part on the side of the storage section in the third pipe; characterized by a fourth pipe which is connected to the outlet side pipe and is formed so that heat of the fourth pipe higher than heat of the third pipe is able to be transferred to the refrigerant in the storage section; and a fourth opening and closing valve which is provided in the fourth pipe and switches whether or not to allow the refrigerant in an upstream part in relation to the storage section in the fourth pipe to flow into a part on the side of the storage section in the fourth pipe, wherein the opening and closing control section performs opening and closing control of the first opening and closing valve, the second opening and closing valve, the third opening and closing valve, and the fourth opening and closing valve on the basis of the set temperature of the cooling object.