XYL-403Y inverted fluorescent microscope is composed of inverted microscope and Epi-fluorescent microscope. The inverted microscope has the feature to observe the specimen in Culture flask and Petri dish. Epi-fluorescent device applies to the fluorescent microscopy. It is equipped with long wording distance plan achromatic objectives, wide field eyepiece, binocular observation head, phase contrast kit and phase contrast objectives. The transparent alive objects can be observed without dyeing. Epi-fluorescent microscope adopts to Epi-illumination excitation to make fluorescent image clear. Long working distance condenser can contain higher culture dish and specimen. This equipment is specially suitable for micro research of living cells ＆ university, medical treatment, epidemic prevention department and farming ＆ stock raising,etc.