A self-built Microscope provides a preconfigured optical path and is highly suitable for experiments requiring epi-illumination or reflected-light image. The system is equipped with LED Light Sources and, together with Lens and diaphragm, helps users better illuminate samples. The trinocular Eyepiece of the Cameras interface supports real-time viewing of samples directly through the Eyepiece. The system is equipped with a high-precision rotary Objective Lens mount, supporting the simultaneous mounting of up to five Objective Lenses. In addition, the system uses a C-mount threaded Cameras interface compatible with most Cameras that meet technical standards; they can be used to view images in real time on a computer screen or capture images for subsequent analysis. Unlike other Microscopes, the modular design of the self-built Microscope allows users to quickly install and remove Microscope modules according to the needs of each experiment, providing a high degree of freedom in operation and control. The open space below the Objective Lens provides ample space for users to operate or extend the optical path. This allows custom components to be integrated with your experiments.