News media are relying more and more on data information, which leads to the emergence of sensor in the field of news production. Sensor journalism refers to a new pattern of news production in which we obtain data through sensor, and after analyzing and integration, blend them into news reports in certain ways, thus telling a story. In recent two years, some American media have given further interpretation to this new pattern through a series of investigative reporting, some of which even won the Pulitzer Prize thanks to this. When professional journalists have a lot of experiences in sensor journalism, they may make a new pattern of news production, but inevitably some legal and ethical issues are coming out and should be studied.