The diversity and dynamics of the immune system pose many challenges for modern cancer treatment. Proteomics based on cell populations has been difficult to meet further research on the interaction of tumor cells with the immune system. To gain more insights for cancer immunotherapy, Creative Biolabs offers a comprehensive assessment of systemic immunity and the tumor microenvironment through single-cell proteomics. Single-cell proteomics technology enables systematic analysis of the protein levels of many single cells in the immune system and tumor microenvironment, allowing direct assessment of immune cell functional status and tumor-immune interactions, which can be used to assess immunotherapy efficacy and improve clinical outcomes.