The invention relates to an 
osmosis water purifier with monitoring. The 
osmosis water purifier includes a water pump, and a filtering unit and a 
reverse osmosis (RO) membrane 
treatment unit which are successively connected to a water inlet 
pipe. A 
wastewater outlet end of the RO membrane 
treatment unit is connected to a 
wastewater pipe which is used for discharging 
wastewater. A 
clean water outlet end is connected to a 
water storage barrel. The 
water storage barrel is connected to the 
clean water outlet. An 
electromagnetic valve is arranged on a water inlet 
pipe of the RO membrane 
treatment unit. The filtering unit includes, successively, a PP filter core, a 
granular activated carbon filter core and a compressed carbon filter core, wherein a 
water flow quantity monitoring apparatus is disposed at the water outlet end of each filter core in the filtering unit. A TDS detection apparatus is arranged on the water outlet end of the RO membrane treatment unit. The 
water flow quantity monitoring apparatuses and the TDS detection apparatus are both connected to a display apparatus. The wastewater pipe is also provided with a wastewater proportioner. The 
osmosis water purifier allows the filtering unit to be monitored timely, increases service life of a RO membrane, reduces 
energy consumption and reduces wastewater production amount.