New York City, a famous cosmopolitan city in the world, is full of everything that makes people cannot help to love it but also suffer from it. In terms of sufferings, more and more people would like to call 311 and compliant on whatever bothers them, even they know that their problems could not be solved immediately. However, just because of 311 services, researchers in relevant field are able to extract useful information from those complaints and compiled them into a database for feature use, if necessary. In my research paper, I would use 311 complaint data to investigate why people are complaining and what factors make them complain the most. More importantly, I want to figure out whether or not those complaining motives are related to metal stress.