Vehicle heat management system

A vehicle heat management system, comprising:

• a refrigerant circulation line configured to generate heat or cold air depending on the direction of flow of a refrigerant;
• a heater core-side coolant circulation line configured to transfer the heat of the refrigerant generated in the refrigerant circulation line to a vehicle interior-side heater core to heat a vehicle interior;
• a battery-side coolant circulation line configured to circulate a coolant to a battery;
• a water-cooled heat exchanger configured to transfer the heat of the refrigerant generated in the refrigerant circulation line to the coolant in the heater core-side coolant circulation line;
• an electric heater configured to heat the coolant in the heater core-side coolant circulation line;
• and
• a coolant flow control part configured to circulate the coolant in the heater core-side coolant circulation line heated by at least one of the water-cooled heat exchanger and the electric heater toward at least one of the heater core and the battery of the battery-side coolant circulation line according to an air conditioning mode condition.