To set up a new effective method for measuring the adhesion between red blood cells and vascular endothelial cells, we studied the relationship between adhesive red blood cells and light transmission by using Microscope-Photometric-Monolayer-Technique Elias-c Analyzer in our department. The results showed that the method of light transmission measurement on the adhesion between red blood cells and vascular endothelial cells is simple, effective and reliable.