A high-voltage permanent magnet frequency conversion all-in-one machine according to an embodiment of the present disclosure includes a frequency converter configured to perform frequency conversion on a high-voltage alternating current, and output at least three alternating currents, a permanent magnet motor configured to receive the alternating currents subjected to the frequency conversion and output from the frequency converter, to drive the motor to operate, and a controller configured to control the frequency converter to perform the frequency conversion on the high-voltage alternating current, and control an operation state of the permanent magnet motor.