The invention discloses a rendering method and a system of a focusing type light field camera. The method comprises steps of: S1, inputting pictures shot by a focusing type light field camera and recording position information and center information of each micro-lens and each subaperture graph; S2, according to a plane image needing to be re-focused, calculating the depth of filed thereof, and according to the depth of field, determining the size of the radius R; S3, in the center position of each subaperture graph, taking a regular hexagon region block with the radius R; S4, laying and combining the regular hexagon region blocks according to the sequence of the subaperture graphs so as to obtain a combined graph; S5, processing the combined graph so as to obtain the final rendering graph. According to the invention, by taking advantages of hexagonal arrangement features of a micro-lens array, and taking the regular hexagon region blocks of the subaperture graphs of the micro-lenses, in the rendering process, the calculated amount of the rendering method of the focusing type light field camera can be effectively reduced without conversion of a coordinate system.