Being lively and free in its form, the outdoor Taiwanese Opera tends to combine with Popular culture; and the contents and traits of ”O-pei-la-hi(胡撇仔戲)” is the best presentation of this combination. ”O-pei-la-hi” was originally an expedient creation (for Taiwanese Opera) when the political conditions put strict restriction on the latter. However, as it develops freely with market forces, ”O-pei-la-hi” has made itself one of the popular performances appealing to the public tastes. Since ”O-pei-la-hi” has taken a great number of elements from Popular culture, this article will probe into the association between the outdoor Taiwanese Opera and Popular culture based on the development of ”O-pei-la-hi”.