With the accelerated globalization, domestic and international communications become more frequent than ever before. As the major media of international communication, languages contact with each other more actively by day. And in the active contact any language would gradually develop and change. Pidgin language is a unique linguistic phenomenon resulted from the frequent language contact. By taking pidgin as an example, this article attempts to shed some light on the language development models in the frequent contact and how one language reacts to its environment, which includes a foreign language, a new culture and new information. With "Chaos Theory" brought to the horizon, this paper figures out three ways, namely, to progress, to decay, and to remain untouched, for any language to choose from when it is in contact with a new environment.