The self-assembled microscope provides a pre-configured optical path, which is very suitable for experiments requiring epi-illumination or reflected light imaging. The system is equipped with an LED light source, along with lenses and diaphragms to help users better illuminate the sample. The camera interface's trinocular head supports direct real-time viewing of the sample through the eyepiece. The system is equipped with a high-precision rotating objective lens turret, which can support the simultaneous installation of up to five objective lenses. Additionally, the system uses a C-mount threaded camera interface compatible with most industry-standard cameras, which 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-assembled microscope allows users to quickly install and disassemble microscope modules according to the needs of each experiment, providing a high degree of operational and control freedom. The open space below the objective lens provides ample room for user operation or optical path expansion, enabling custom components to be integrated with your experiments.