Float-type ammonia-nitrogen water quality detecting system and detecting method of detecting system

The invention discloses a float-type ammonia-nitrogen water quality detecting system. The detecting system comprises a waterproof tank, a float and a detecting device, wherein the detecting device comprises an air pump, a three-phase valve, a blank solution chamber, a reaction chamber, a detecting chamber, a sensor and an electrochemical analyzer; the three-phase valve is communicated with the air pump, the blank solution chamber and the reaction chamber, the blank solution chamber is communicated with the reaction chamber, the detecting chamber is communicated with the blank solution chamber and the reaction chamber through the sensor, and the sensor is further electrically connected with the electrochemical analyzer. In this way, the float-type ammonia-nitrogen water quality detecting system and a detecting method of the detecting system have the advantages that water quality detecting equipment can be directly put in any to-be-detected water to detect surface water more directly and more reliably, can also