The present invention provides a data processing system and a data collection method by which measurement data can be read in and transmitted easily, without connecting a terminal for transmitting data with various types of measurement apparatuses, and further provides a measurement apparatus to be used for the data processing system and the data collection method. The data processing system at least uses: a measurement apparatus (10) provided with a display screen (13); a terminal (20); and a server (30). The measurement apparatus (10) includes: a measurement portion for obtaining measurement data; a code transforming portion for transforming the measurement data into a bar code, a two-dimensional code (8) or a composite code; and a display portion for displaying the code on the display screen. The terminal (20) includes; an image pickup portion for picking up an image on the display screen (13) that displays the code; an analysis portion for generating measurement data for transmission by analyzing the code that is picked up; and a transmission portion for transmitting, to the server (30), the measurement data for transmission. The server includes a memory portion for storing the transmitted measurement data for transmission.