The invention discloses a footprint recognition and information mining method and system based on a convolutional neural network, and the system comprises: an acquisition module which comprises a pressure sensor and a camera, and collects a footprint image and biological information of a to-be-detected person; a prediction module which is used for carrying out preprocessing and feature extractionon the collected footprint images to obtain identity information or predicted biological information; a display module which is used for displaying the identity information or the predicted biologicalinformation obtained by the prediction module; and a transmission module which is used for transmitting the identity information or the predicted biological information obtained by the prediction module to other equipment terminals for display. The footprint identification and information mining method and system based on the convolutional neural network technology provided by the invention are realized through the convolutional neural network formed by the convolutional layer with the direction and scale information, and the footprint identification and information mining accuracy is effectively improved.