The utility model discloses a water conservancy information data acquisition terminal based on a radio frequency technology. The water conservancy information data acquisition terminal comprises a microprocessor, an AD signal processing module, a memory, a clock module, a power supply module, a signal acquisition module of a hydrographic sensor, a serial port communication module, a parallel port communication module and a radio frequency module, wherein the AD signal processing module, the memory, the clock module and the power supply module are connected with the microprocessor, the signal acquisition module of the hydrographic sensor consists of an optical coupler isolation chip, a latch chip and a voltage comparator, the optical coupler isolation chip is connected with an interrupt interface of the microprocessor to be used for acquiring a pulse signal; the latch chip is connected with an IO port of the microprocessor to be used for acquiring a parallel signal; the voltage comparator is connected with the microprocessor to be used for conditioning a voltage signal, and the serial port communication module, the parallel port communication module and the radio frequency module are connected with the microprocessor respectively. According to the water conservancy information data acquisition terminal disclosed by the utility model, various hydrographic information can be comprehensively acquired and are sent to a central node by virtue of a radio frequency mode, and thus a network hydrographic data acquisition system is formed.