Data processing system, data processing method, and program

The deterioration diagnosis of the servo system (7) is not easily misguided. A data processing system is provided with an acquisition unit (2), a first generation unit (3A), a second generation unit (3B), and a presentation unit (47). The acquisition unit (2) acquires at least one of a control signal of the servo system (7) and a detection signal from the sensor (61). A first generation unit (3A) generates first data relating to three or more feature quantities on the basis of a predetermined region in the signal waveform. A second generation unit (3B) generates three or more pieces of second data that respectively indicate the trend of change over time of the first data relating to the three or more feature quantities. The presentation unit (47) compares the three or more pieces of second data with each other, and if specific second data exhibiting a different variation trend exists, the presentation unit (47) performs a specific process relating to target data, which is the first data causing the different