作为国家的根本法,宪法始终面临着创建民主体制、维护民主制度、确保民主效果的任务。释义学无力回应民主制度的建构性功能与宪法发挥效力的全部过程。宪法设计民主制度,并控制民主过程。宪法工程将宪法视作一台机器,可以进行设计。何种民主?如何实现?这是宪法工程的任务。它不强调宪法作为需要进行演绎推理的规范体系,而是分析其作为规则和程序的引导功能,以及作为动力机制的激励功能。宪法工程阐明宪法与民主的关系,沟通规范与现实。它凸显了实证宪法的存在空间和积极功能,推动了政治宪法学的领域扩张。运用宪法工程会带来民主宪法的复归。 As the fundamental law of the country, the constitution has always been faced with the task of establishing a democratic system, safeguarding the democratic system and ensuring the democratic effect. Interpretation can not respond to the constructive function of the democratic system and the whole process of the effectiveness of the constitution. The constitution devises democratic systems and controls the democratic process. The constitutional project treats the constitution as a machine that can be designed. What kind of democracy? How to achieve? This is the task of constitutional engineering. It does not emphasize the constitution as a normative system that requires deductive reasoning, but analyzes its guiding function as a rule and procedure and as a motivational function. The constitutional project clarifies the relationship between constitutional law and democracy, communication norms and reality. It highlights the existence space and positive functions of the empirical constitution and promotes the expansion of the field of political constitutional law. The use of constitutional engineering will bring about the restoration of a democratic constitution.