Karan Rastogi and Divij Sharan were the defending champions but decided not to participate.
Sanchai Ratiwatana and Sonchat Ratiwatana won the title, defeating Gong Maoxin and Zhang Ze 6–4, 6–2 in the final.
Yang Tsung-hua and Yi Chu-huan won the last edition in 2009.
Prakash Amritraj and Philipp Oswald won the title, defeating Sanchai Ratiwatana and Sonchat Ratiwatana 6–3, 6–4 in the final.
Sanchai Ratiwatana and Sonchat Ratiwatana were the defending champions but decided not to participate.
Purav Raja and Divij Sharan defeated Chris Guccione and Matt Reid 6–4, 7–5 in the final, to win the title.
Gong Maoxin and Peng Hsien-yin were the defending champions, but lost in the final to Hsieh Cheng-peng and Yang Tsung-hua 6–2, 6–2.
Sanchai Ratiwatana and Sonchat Ratiwatana won the title, defeating Chen Ti and Franko Škugor in the final 6–4, 2–6, [11–9].
Benjamin Mitchell and Jordan Thompson are the defending champions, but only Mitchell defending his title partnering Matthew Barton.
This was the first edition of the tournament.
Matthew Ebden and Wang Chieh-fu were the Santaizi ATP Challenger defending champions in 2016 but only Wang chose to defend his title, partnering Hung Jui-chen. Wang and Hung lost in the first round to Hsieh Cheng-peng and Yang Tsung-hua.
This was the first edition of the tournament.
Wu Di and Yi Chu-huan were the defending champions but chose not to compete together. Wu played alongside Zhang Zhizhen. Yi teamed up with Hsieh Cheng-peng. Wu lost in the quarterfinals to Gao Xin and Li Zhe.
Hsieh Cheng-peng and Yang Tsung-hua were the defending champions but chose not to participate together. Hsieh partnered Yi Chu-huan, while Yang partnered Jeevan Nedunchezhiyan. Yang lost in the first round to Wu Tung-lin and Zhang Ze. Hsieh lost in the final to Sanchai and Sonchat Ratiwatana 4–6, 6–7(4–7).
Hsieh Cheng-peng and Yang Tsung-hua were the defending champions but lost in the semifinals to Sanchai and Sonchat Ratiwatana.
Hsieh Cheng-peng and Yang Tsung-hua were the defending champions but chose not to defend their title.
Sanchai and Sonchat Ratiwatana were the defending champions but lost in the quarterfinals to Hsieh Cheng-peng and Yang Tsung-hua.
In the 2018 Seoul Open Challenger Doubles tennis tournament, Hsieh Cheng-peng and Peng Hsien-yin were the defending champions but chose to defend their title with different partners. Hsieh partnered Christopher Rungkat but lost in the quarterfinals to Toshihide Matsui and Frederik Nielsen. Peng partnered Aliaksandr Bury but lost in the semifinals to Chen Ti and Yi Chu-huan.
Hsieh Cheng-peng and Peng Hsien-yin were the defending champions but chose to defend their title with different partners. Hsieh partnered Yang Tsung-hua and successfully defended his title. Peng partnered Yi Chu-huan but lost in the first round to Benjamin Lock and Rubin Statham.
Toshihide Matsui and Yi Chu-huan were the defending champions but only Yi chose to defend his title, partnering Peng Hsien-yin. Yi lost in the first round to Gong Maoxin and Zhang Ze.
Sanchai and Sonchat Ratiwatana were the defending champions but lost in the semifinals to Hsieh Cheng-peng and Yang Tsung-hua.
Gong Maoxin and Zhang Ze were the defending champions but lost in the first round to Nam Ji-sung and Song Min-kyu.
Hsieh Cheng-peng and Christopher Rungkat were the defending champions but chose to defend their title with different partners. Hsieh partnered Yang Tsung-hua and successfully defended his title. Rungkat partnered André Göransson but lost in the first round to Sadio Doumbia and Fabien Reboul.
Hsieh Cheng-peng 
Nicolás Barrientos 
Ruben Gonzales 
