In the process of making strategies, modern enterprise should not only collect internal information but also pay attention to the external information more seriously. And modern enterprise should take this as an important foundation for enterprise’s survival and development. Monitoring competitive environment is a basic work for making competitive strategy, implementing strategic decision and gaining competitive advantage. From the perspective of driving force analysis, we trace to the decisive force, which affects enterprise’s development. Based on driving force analysis, we construct competitive environment monitoring model, then correlate the "force" of enterprise’s development with the needed monitoring information, and provide scientific foundation for strategic decision finally.