The unilateral right of choice of law refers to the right, belonging to one of the parties involved in Foreign-related civil disputes, of choosing the proper law applicable to the involved civil relations unilaterally. Emerging form the time of American Revolution of conflict laws, this right, which is mainly embodied in the areas of international torts, testate succession and trust, has been incorporated and adopted by increasing national legislation and international conventions in the past decades. The emergence and development of the right effectively riches the theory of law selection and promotes the material justice. China should combine the actual situation and adopt such approach of legal option into law amendment in the future.