Even though marriage-immigrants and foreign students have increased steadily, it is hard to find observation studies or experiment studies on their actual language use. This research examines spoken and written language characteristics of marriage-immigrants and foreign students with their interview and writing. The collected data was analyzes after dividing it into linguistic aspect and language use aspect. Linguistic aspect can be classified into three(lexical, syntactic, conversational) kinds. Language use aspect is classified centering on the use of sociolinguistic, strategic, speech act kinds. As a result, Korean language learners have something in common in the process of learning Korean. And Research shows some difference between marriage-immigrants and foreign students according to learning purpose(KFL, KSL), textbook, conversational setting etc. These comparison will be helpful to understand Korean language learners" Korean use and suggest eh efficient method of Korean education to prevent misuse in Korean language learners.