In an electrophoresis system, a specimen is analyzed on the basis of a division image obtained by applying the specimen on a substrate and causing an electrophoresis phenomenon to occur. The electrophoresis system comprises a refractometer for measuring the total protein amount of said specimen, a mechanism for applying the specimen onto the head surface of the refractometer, a mechanism for cleaning the head surface of the refractometer, and memory and processing sections for storing the measured data and performing the arithmetic processing with the data obtained on the basis of the division image.