TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The exhaust valve A of the nitration reactor is provided with an air-liquid separating device A, where one end of the air-liquid separating device A is connected with the exhaust valve A, and the other end is communicated with the nitration reactor. The exhaust valve B of the denitrification reactor is provided with an air-liquid separating device B, where one end of the air-liquid separating device B is connected to the exhausting valve B and the other end is communicated with the denitrification reactor. The nitration reactor is provided with a pressure sensor A. The denitrification reactor is provided with a pressure sensor B. The nitration reactor and the denitrification reactor are filled with a biological filling. The microbes for enriching and domesticating are obtained from the aerobic and anaerobic active sludge of the life sewage treating plant. Preferred Method: The urine wastewater treatment further comprises step (c) discharging the nitrate nitrogen wastewater to the nitrate nitrogen waste water collector from the nitration reactor, and discharging a part of the nitrate nitrogen waste water from the water outlet communicating on outer side to circulate, and moving the other part of the nitrate nitrogen wastewater to the denitrification reactor; (d) treating the nitrate nitrogen waste water by the microbe in the denitrification reactor to obtain the treated urine wastewater; and (e) discharging the treated urine wastewater to the reverse osmosis device from the denitrification reactor to obtain the collected water, and the device comprises a reaction system, an analyzing and detecting system and a course control system. The enriching and domesticating microbes for treating urine wastewater further comprises (ii) moving the wastewater treated by the microbes in the aerobic active sludge to the anaerobic active sludge in which the pH is 7-9, the concentration of the dissolved oxygen is under 0.5 mg/l, and the temperature is 28-35 degrees C, and enriching and domesticating the microbes in the aerobic active sludge, where the total nitrogen removing rate namely the ratio of the total nitrogen removed from the drained water to the total nitrogen in the urine wastewater is more than 85%. The reaction conditions for the nitration reactor is as follows the pH is 7-8.5, the concentration of the dissolved oxygen is 2-4 mg/l, and the temperature is 25-30 degrees C. The reaction conditions in the denitrification reactor is as follows the pH is 7-9, the concentration of the dissolved oxygen is below 0.5 mg/l, and the temperature is 28-35 degrees C and the stirring speed in the nitration reactor and the denitrification reactor is 10-20 revolutions/minute.