The purpose of this study is to analyse the effects of a Korean course using Korean wave contents and smartphones, specifically for Singaporeans who are learning Korean for hobby purposes(KHP). Based on KHP learners’ needs and characteristics, which were found through the statistical analysis of survey data, the design principles for KHP courses were made as follows: 1) Maximise the use of Korean wave contents. 2) Use smartphones for more practice outside of the classroom. 3) Focus more on the spoken language rather than the written language. 24 KHP learners who have the same proficiency were divided into two groups, experimental and control groups. The class in the experimental group were designed according to the principles by using Korean wave contents, Quizlet and speaking tasks whereas the control group used conventional methods. As a result, it was found that the experimental group achieved higher scores and made positive changes in their affective aspects of Korean learning. This study is significant as it suggested the principles of KHP courses based on the KHP learners’ needs and has shown its effects. However, this study was carried out with a small number of students in a short period of time, thus it is necessary to carry out a more extensive investigation for future research. (ONLYOU Korean Language School)