Cheng was a member of the "Green Team," Taiwan's most important outsider documentary group in the 1980s. Whether about labor, the environment, indigenous peoples, or politics, they worked on documentaries for just about every progressive social movement and disadvantaged group.
鄭文堂曾是 80 年代台灣最重要的體制外紀錄片團體「綠色小組」成員，只要是有關勞工、環保、原住民、政治，及各種弱勢議題，他們幾乎無役不與。