This study aims to review studies about foreign / second language teachers' language assessment literacy (LAL) from 1987 to 2019. Within the scope of this study, 82 research studies and articles are investigated in the national and international spheres. Perceptions of assessment literacy are unpacked to find out language teachers' background and needs in LAL. Subtopics are determined to categorize the research studies as assessment courses, teachers' knowledge base in language assessment, their beliefs and practices in language assessment, their training needs in assessment, professional development in LAL, perceptions in LAL, and effect of LAL and curriculum on exam preparation. This review article indicates the general view on EFL teachers' LAL level and makes suggestions in developing language assessment literacy.