The environment of contemporary enterprises is complex, changeable, and unpredictable so far. The response for growing turbulence of environment should be growing flexibility of enterprise. There was defined notion of flexibility and characterized chosen types of flexibility. In the article there was also presented solution of environment monitoring system, which supplies managerial staff of enterprise with indispensable information concerning changes in the environment. Application of information resources of the system ensures flexibility of the enterprise both ion the area of strategic decisions and operational ones. The measurable effect is optimal reactions of the enterprise for environment changes.