The move is an attempt to improve the quality of trial proceedings in the Internet era, court spokesman Guo Xiaokun said.
The Zhengzhou Intermediate People's Court in China's Henan province conducted its first WeChat trial on December 17, employing the app's text and photo sharing abilities.
Use of the app is expected to make many types of lawsuits much easier, Xue Yongsong, a staff member at the court said.
The WeChat trial took just a half an hour to deal with tasks that would have required a full day in the traditional system," state-run China Daily quoted Xue as saying.
More From This Section
Since a revised system for lawsuit registration took effect on May 1, the number of administrative lawsuits filed at the court increased 83 per cent in one year - 1,790 cases in 2015.
Wang Yongjie, director of the Beijing Zeyong Law Office, said WeChat trials could be fast and convenient, as they are free of time and place restrictions.
Wei Liping, a judge at the court who joined the first WeChat trial, said the new platform could play a helpful role.
"We worked with both online and offline support, then we selected some suitable cases," Wei said.
"For me, it really reduces the time and energy. It is useful because it leaves judges with more time to deal with more complex cases," Wei added.
The WeChat trial system will be updated in the future with a standardised, orderly platform and real-name identity authentication, data export abilities and privacy protection, Guo said.