The Underwater Mechatronics Laboratory (UML) was established in 1996 in the Institute of Undersea Technology at National Sun Yat-sen University, Taiwan. The research in the UML is focused on design and development of underwater instruments and systems for specific scientific needs. The UML delivers this objective through integrating mechanical engineering, electrical engineering and computer science in a vibrant, collaborative environment that fosters interactions between students, research staff, faculty, and industrial partners. Several systems and instruments have been developed and introduced to undersea exploration, including the Abyss Twisted-pair Imaging System (ATIS), the Fiber-optical Instrumentation Towed System (FITS), the Video-guided Multi-cores (V-Corer), ocean bottom seismometer (OBS), the Seafloor Laser-line Scanning System (SLSS), the Seafloor Acoustic Transponder System (SATS), the ROV Auroree, and AUV.