Proteomics is one of the most important research topics in the field of life science, along with genomics and transcriptomics. With the assistance of next-generation sequencing, large-scale of sequence information can be used in mass-spectrometry-based proteomics. Base on the development of mass spectrometry, we can identify thousands of proteins in a short time and also compare the difference of the amount of a protein in two different samples or treatments. Our proteomics service can also identify post-translational modification (PTM) site, epitope mapping, and protein sequencing, which are all very important in cell modification and regulation. Finally, proteomics can help us to discover the information that which genomics can't explain and help us in developing the study of the protein drug.