The invention discloses an implementation method and system for viewing live video by scanning a two-dimensional code. The method transmits an identifier of a device to a platform, the platform converts a video original stream into an HLS stream through a streaming media server, then transmits the HLS stream back to a foreground, and plays live broadcast through an H5 page, and the method comprises the following steps that: step 1, a mobile camera pushes video data to a private streaming media server; step 2, the streaming media server performs transcoding service by using an open source technology FFmpeg, distributes video streams such as HTTP-FLV, HLS and the like, and stores video data; and step 3, an HLS video stream is loaded on an H5 page of the browser, and the HLS video stream is played. According to the invention, the mobile camera and the streaming media server+H5 are adopted for playing, so that the use of the majority of users is well satisfied, and the users get rid of binding of various APPs and can check videos anytime and anywhere. According to the two-dimensional code, on-site construction personnel can be clear at a glance, the operation is simple and easy, and thus the working efficiency of the construction personnel is higher.