To accurately analyze abnormality in a machining state in a short time.

This machining monitor for monitoring the machining state of a machining device comprises a monitor camera monitoring the machining state; a sound collection microphone provided near the monitor camera; a camera server acquiring an image from the monitor camera and converting the image into digital image data; a main memory storing the digital image data and acoustic data from the sound collection microphone in synchronization with the digital image data; and a computer system reading the data concerning the machining state from the main memory.