A microwave heating system heats a hermetic container (10) loaded with a heated object (11). The hermetic container (10) is accommodated and given pressure by a microwave transparent and pressure resistant module (40), and is fixed onto a transporting device (30) in a cyclic course. Microwave is generated by a microwave heating device (50) to perform heating. The hermetic container (10) is stirred while the transport device (30) carries and moves the hermetic container (10). The temperature of the hermetic container (10) or the heated object (11) is measured by a temperature measuring module (60). The number of times to stir and repeatedly heat the heated object (11) are appropriately determined in the design of the system. The output power and heating time of the microwave heating device (50) and the transmission speed of the transporting device (30) are adjustable during operations of the system, hence forming a closed-loop temperature control system.
