Abstract: In response to the problem of less than 50% online rate of AIS communication equipment on fishing vessels in Guangdong Province^,s national treasury in 2023 and frequent maritime accidents on fishing vessels,this article develops a photovoltaic intelligent supervision device for fishing vessel safety operations,which supports four specifications of power output,residual power output,and operation status display,including 5 V,9.5 V,12 V,and 24 V.It has battery safety protection strategies such as SOP,SOH,and SOC,fault diagnosis,photovoltaic charging balance,and Beidou short message communication functions.At the same time,a “Photovoltaic Carbon Neutrality” management platform for fishing vessels has been developed,which has multiple functions such as positioning and operating status monitoring of onboard photovoltaic intelligent supervision devices,monitoring of fishing vessel dynamic trajectories,calculation of vessel return to port,typhoon forecasting,and management of fishing vessel archive information,achieving real-time monitoring and safety management of fishing vessels.The equipment and its platform have been demonstrated and applied in Daya Bay Fishing Port in Huiyang District,Huizhou City,Jiazi Fishing Port in Lufeng City,Shanwei City,Yanmen Fishing Port in Shenzhen Shantou Special Cooperation Zone,Hengshan Fishing Port in Taishan City,Jiangmen City,and Hongwan Fishing Port in Xiangzhou District,Zhuhai City.They have received unanimous good reviews from relevant fishery departments and users,effectively improving the safety production level of fishing vessels.