1. Introduction portable echo sounder system is an important tool for fishery resources survey and evaluation, and is widely used to monitor the behavior of fish, fish identification of sex, to assess other aquatic biomass, probing the bottom of the water body types, monitoring water quality and aquatic ecosystems . In fact, in addition to fish resources survey and evaluation, reservoir aquaculture, fish farming Wen, deep-sea cages and ponds as well as precision farming in general also has great application prospects. 2, the main technical characteristics - high-resolution data output:?? The minimum pulse width of up to 0.1ms. ? Distance high-resolution, 1400 can be divided into layers, the minimum resolution of up to 10cm. ? Every six seconds can be a data summary. ? - Simultaneous real-time echo integration, target strength (converted to body length), three-dimensional target tracking (each being tracked fish TS calculation), echo counting, direction and speed of movement of the fish. ? - Terms of signal to noise ratio, FM chirp signal can provide up to 15 dB of gain. ? - Users can post-system integration, data can be wireless receiver. ? - The system can be equipped with a video camera, captured images can be judged according to the type of fish or gender specific. 3, hardware and technical specifications 3.1 Deck signal processing unit for processing signal transmission and reception. 3.2 Transducer all transducer built-in pre-amplifier, signal to noise ratio have been optimized. Select the appropriate transducer without fishway according to the actual situation. 3.3 PTZ for remote control transducer detection angle, avoiding manual adjustment and installation difficulty. 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. 4, ECHOSCAPE Windows-based software system, the user can analyze the number and variation of fish pass. Fish and fish body length distribution probe 6, Applications