Integrated Thermal Management System

An embodiment integrated thermal management system includes a refrigerant circuit including a compressor, a condenser, an expander, and an evaporator, a first coolant line including a first heat exchanger configured to exchange heat with the evaporator of the refrigerant circuit and an internal heat exchanger configured to adjust a temperature of air-conditioning air through heat exchange with a coolant, first and second switching valves respectively disposed at front and rear ends of the internal heat exchanger in the first coolant line, a second coolant line connected to the first and second switching valves and including a second heat exchanger configured to exchange heat with the condenser of the refrigerant circuit, a third coolant line branching off from the first coolant line and including a battery, and a fourth coolant line branching off from the first coolant line and including a PE component.