Since 2000, the major cities and tourist city in the country to require installation lampblack purification facilities, catering industry, however, in the years that followed, lampblack nuisance complaints have not fallen, it is on the rise, there is no purpose of purifying lampblack, the installation of energy conservation and emissions reduction. Investigate its reason, mainly or regulation is not in place, resulting in the vast majority of lampblack purifier abnormal working state. "People don't do what you want, just do you check", only perfect the lampblack regulation, to ensure the continuous long-term effectiveness of lampblack purification, achieve the purpose of purifying lampblack, energy conservation and emissions reduction, and soot online monitoring is important means to perfect lampblack is very effective.