Thank you for your inquiry. 

To chang your visa status, you must obtain a visa status change permission from the Ministry of Justice. You can apply for such permission at your local immigration office. The required documents for the application are an application form for visa status change, a passport and an alien registration card. The application fee is 100,000 won. 

Please be informed that the 'Visa, Passport' content (Visa, Passport | Easy to Find, Practical Law (easylaw.go.kr))on this website offers useful information associated with Korean visas. 

We are an organization for providing legal information, and thus, if you need further information on the required documents and the application procedures, you may inquire at Hi Korea (https://www.hikorea.go.kr/), which is the e-government portal for foreigners. 

We look forward to continuing to serve you in the future. 

Thank you.