Valve apparatus and integrated thermal management system using same

A valve apparatus and an integrated thermal management system using the same are proposed. In the valve apparatus and the integrated thermal management system, a plurality of coolant circuits is integrated with one valve to be compactified, so that it is advantageous in terms of manufacturing and utilization of space is improved while being compactified. Furthermore, as heat exchange between a coolant circulated in each coolant line and a refrigerant circulated in each refrigerant line is performed in response to various thermal management modes, the efficiency of the thermal management including cooling of an electric part and a battery, and indoor heating using waste heat of the electric part and the battery is improved, thereby securing a traveling distance of an electrified mobility.