Constitutionalism accords with basic principles of the rule of law under democracy. To discuss basic values of constitutionalism, we need clarify essential characters and internal morality of the rule of law, expound fundamental distinctions between constitutionalism and the rule of men, and make distinction between the rule of complying with legal regulations and that of insisting in the spirit of the rule of law. On the other hand, as a special example, civil disobedience seems to violate the rule of law, but essentially is a particular way of insisting in the rule of law.