Low-cost inspection scheme based on industrial non-invasive load identification is proposed to address the environmental moni?toring issues of equipment operation on construction sites. Firstly, load characteristics of dust removal equipment that suppresses air pollu?tion and construction equipment such as static pressure machines that generate noise and vibration pollution are analyzed. Then, a multistage event detection and identification method for environmental inspection is proposed, which overcomes the identification difficulty ofdust removal equipment easily submerged by construction equipment loads. Lastly, a real case is used to verify, and experimental resultsshow that the proposed algorithm greatly improves the detection ability and anti-noise interference ability for complex process events, andrealizes synchronous and efficient detection of the start stop process of construction equipment and dust removal equipment.