The invention discloses a marine ranching shore-based monitoring system which belongs to the field of marine technology. The marine ranching shore-based monitoring system comprises a shore-based control system, a seabed observing platform, a monitoring control center and a submarine cable. Sensor data and a seabed real-time video are integrated through the seabed observing platform and are transmitted to the shore-based control system through a cable. The shore-based control system transmits data to the monitoring control center. The instruction of the monitoring control center is successively transmitted to the shore-based control system and the seabed observing platform for realizing remote control. According to the marine ranching shore-based monitoring system, a problem of integrating energy supply and data transmission in an underwater system is settled through designing the seabed observing platform and arranging the submarine communication cable. The marine ranching shore-based monitoring system realizes long-term real-time online stable and automatic monitoring on marine essential factors such as ecological environment.