Modularization local area network monitoring system applied in 3D printing equipment

The invention discloses a modularized local area network monitoring system applied to 3D printing equipment. The modularized local area network monitoring system comprises a local area network monitoring device, a data relay network and an upper computer, wherein the local area network monitoring device, the data relay network and the upper computer are sequentially connected. The local area network monitoring device is connected with the 3D printing equipment. The modularized local area network monitoring system can be used when plugged, the upper computer does not need add-on hardware, complete control over the 3D printing equipment is achieved, and the data reading ability is achieved. Each part of the modularized local area network monitoring system can be selectively used or replaced, and the modularized local area network monitoring system has the expansibility.