1. Introduction in fisheries research, the use of radio frequency identification technology to help identify and track individual fish, but did not affect the behavior of the tagged fish, long life PIT tag, lifelong existence fishes, fish, beneficial research Class entire life history, therefore, fish migration, monitoring, etc. Passing, PIT tag system is a reliable? efficient and effective means of monitoring. With this method, we can understand the activity patterns of fish, seasonal migration, resource, survival / mortality. 2, the main features? Achieve individual monitoring and research? System can be powered by the solar cell is powered by a battery. ? The system is customized to adjust according to the application environment (fishway, dams, etc.). ? Windows-based operating software, you can view all the data. ? User system can be integrated later, data can be wireless reception. ? System can be equipped with a video camera, captured images can be judged according to the type of fish or gender specific. ? The system can parallel multiple antenna elements for monitoring the waters of the fishway entrance ago. 3, 3.1 PIT tag hardware products on animals identified by radio frequency identification systems, labeling glass products are non-toxic and harmless. Can be implanted in animals by injection, so that each animal has a unique identity. 3.2 3.3 control unit and antenna system camera system (optional) camera system can take fish out of the situation. 3.4 solar and battery powered system can use solar and battery power, so that the system can be used alone or in many remote environment.