The invention relates to a motor vehicle paint slag, filter paper and cloth sensing system based on precise collection, and belongs to the field of the Internet of Things. The system comprises a motorvehicle paint slag, filter paper and cloth classification and collection supervision system, a motor vehicle paint slag, filter paper and cloth conveying loading and unloading supervision system, anda motor vehicle paint slag, filter paper and cloth storage supervision system, wherein the motor vehicle paint slag, filter paper and cloth classification and collection supervision system, the motorvehicle paint slag, filter paper and cloth conveying loading and unloading supervision system and the motor vehicle paint slag, filter paper and cloth storage supervision system are respectively usedfor the classification and collection, conveying loading and unloading and the storage supervision of the motor vehicle paint slag, filter paper and cloth. At the stages of the classification and collection, conveying loading and unloading and storage of the motor vehicle paint slag, filter paper and cloth, a front end collector is used for collecting the environment temperature, humidity, ventilation flow, liquid flow, pressure intensity, illuminance, weight, pH value, density and liquid level of the motor vehicle paint slag, filter paper and cloth, thereby achieving the real-time monitoringand warning in a flow process.