「憲政民主」是當今許多國家採用的民主制度，而憲政也是民主體制的基礎。憲政是在規範統治者權力的運作與被統治者權利的保障，是代議民主的基礎，其作用在於防止政府權力的濫用，保障公民的自由和權利。傳統上，憲政本身並不直接涉及到政府是否通過民主選舉產生，但現代憲政理論往往與民主的概念密不可分。憲政體現憲政主義的精神，並規範於憲法之中，而憲政越趨於現代，則逐漸與民主的概念結合。憲政民主乃融合了憲政主義、民主價值、以及共和國的國體框架而成，然而憲政民主發展理想則要在法治國裡才能具體實踐。

"Constitutional democracy" is the democratic system adopted in many countries today, and constitutionalism is also the foundation of democratic system. Constitutionalism is to regulate the operation of the power of the rulers and the protection of the rights of the ruled, and it is also the basis of representative democracy. Its role is to prevent the abuse of government power and to protect the libertiesand rights of citizens. Traditionally, constitution does not directly relate to whether the government is democratically elected, but modern constitutional theory is often associated with democratic concept tightly. Constitution embodies the spirit of constitutionalism, and is regulated in the Constitution. Recently, constitution is gradually combined with the concept of democracy. Constitutional democracy is a combination of constitutionalism, democratic values, and formed by the framework of a republic country; however the idea of concept of constitutional development can be realized practiceconcretely in the country of rule of law.