The utility model discloses a processing system is monitored in dustproof automation based on BIM technique, include: environmental monitoring system, BIM information processing system, dust fall controlling means and water storage device water storage device on install level sensor, dust fall controlling means's spraying system's switch ware links to each other with level sensor, dust fall controlling means's switch ware and water storage device's level sensor are all continuous through control line and BIM information processing computer. Application BIM information model accurate control according to monitoring system's real -time feedback, utilizes the water after water storage device will handle to spray to the purpose of job site in order to realize quick accurate dust fall, simultaneously make full use of natural water resources and make full use of the waste water that produces of job site, practiced thrift the water resource, reduced a large amount of manpowers, reduced engineering construction cost.