A novel secondary user selection-based cooperative spectrum sensing scheme for cognitive radio networks is rendered in this paper. It is demonstrated to be more energy-efficient, resource-efficient, and cost-saving. Firstly, we introduce the principle of the conventional cooperative spectrum sensing scheme. Also, the challenges that still exist in the conventional scheme are listed, i.e. high hardware requirement and cost, extra energy consumption, resource-consuming and vulnerable to environmental properties. Then we illustrate the proposed novel cooperative spectrum sensing scheme can address these problems by allocating part of cooperative Secondary Users who are under excellent detection condition to specialize in spectrum sensing in active and passive modes and releasing the others from the burdensome task of spectrum sensing. Finally, the issues related to the proposed scheme are explored.