In ocean environment detection and ocean resources development, an ocean temperature and depth measurement equipment is very important. In this paper, an ocean temperature and depth measurement equipment is designed. Controlled by a single chip microcomputer ATMega128L, the equipment acquires the data of ocean temperature and depth by sensor. Then the data will be stored in the SD card to ensure that the data can be read by computer when the equipment is recycled. Test result shows that the equipment can acquire the data of ocean environment and the time information independently，accurately and continuously. What is more, the equipment can be integrated with other equipments by a favorable interface design, meeting the design requirement.