Classified as a Foreign Language High School under the Ministry of Education, Science, and Technology's categorization of Special Purpose High Schools, Seoul FLHS's curriculum is centered on the specialized education of various European and Asian languages.

Students can gain admission to Seoul Foreign Language High School by demonstrating ability in a variety of areas, but the most common way students are accepted is through SFLHS's own admissions test, which includes written exams and an interview.

Seoul Foreign Language High School has its own admission tests.

SFLHS students choose one primary language as a major upon application from English, German, Chinese, French, or Japanese to study during their three years at SFLHS.

Korean and English are mandatory subjects, regardless of which focus language students choose when entering the school.