The application of mass spectrometry technology in medical examination mainly involves clinical biochemical examination, clinical immunological examination, clinical microbial examination and clinical molecular biological diagnosis, and can replace the traditional methodologies. With the development of precision medicine and breakthroughs in multi-omics research, clinical mass spectrometry has also ushered in new opportunities. With clinical mass spectrometry detection technology as the core, EXPECLIN (a subsidiary of Expec Technology) provides domestically developed mass spectrometry hardware and supporting personalized customization services, in vitro diagnostic kits and application technology, clinical research cooperation, etc., as a new engine for the rapid development of clinical mass spectrometry detection, promoting clinical mass spectrometry detection technology to truly become an accurate diagnostic technology for the benefit of the public.