Provided are an immunoassay method in which, by using a sensor chip on which a plurality of capture regions which capture a material to be detected by a first capturing body are arranged separated from each other, the material to be detected captured by the first capturing body is individually detected, wherein the plurality of capture regions are formed by using a different type of first capturing body depending on the type of a material to be detected to be captured, the method having: a detection processing order determination step of determining a detection processing order between the capture regions based on information about a detection processing order between the plurality of the capture regions; and a detection processing step of performing a detection processing for each of the capture regions according to the detection processing order between the plurality of the capture regions, and an immunoassay system using the method.
