Do foreigners who lived in other country for their whole life need to take SAT when applying UC?

No, international students who have completed their secondary education outside the United States are generally not required to submit SAT or ACT scores to apply to UC schools. The UC system has a test-optional policy for most applicants. However, it's crucial to check the specific admission requirements for each UC campus, as policies can change. While the SAT/ACT isn't required, submitting strong scores *could* strengthen an application, depending on the applicant's overall profile.