Nowadays, live-broadcasting is a common activity and hobby for youngsters. However, multi-camera applications with some broadcasting operations on live-stream video can only be handled by professional broadcasting entities. This application provides a solution to deal with the emerging users’ requirements. This system engages multiple devices acting as a multi-camera. The devices are then connected to a Host Mobile under the same Wifi network (or pocket Wifi device for outdoor activity). The Host Mobile can add on some functions on the video, such as audio control, source video manipulation, editing effect, etc. After that, the Host Mobile can feed the edited video to external application, such as Facebook and YouTube for live broadcasting. This system won the certificate of merit of the Student Innovation Award, HKICT Awards 2019.