Based on deep learning technology and applying image analysis as the core, a variety of simple and interesting contactless human-computer interaction interfaces are constructed, including gestures, virtual keyboards, and handwriting text input in the air. These technologies provide users with a brand-new contactless interactive experience in many fixed-camera and mobile scenarios. We also implement value-added services and recommendation services regarding location information, so that users can effectively obtain their desired content, like well-classified photos of one specific site or the following journey recommendation.