The invention relates to sulfate process titanium dioxide production hydrolysis technologies, and provides a hydrolysis integrated system. A work station is used for setting run programs of a PLC cabinet, monitoring the working state of the PLC cabinet and storing PLC historical working parameters; a gray point judgment instrument is used for detecting light transmittance of titanium liquor, obtaining graying point of the hydrolyzed titanium liquor, comparing the graying point with a preset gray point and transmitting the comparison result to the PLC cabinet; the PLC cabinet is used for controlling the working states of a first temperature controller, a first speed governor, a feeding pump, a pure water pump, a second temperature controller, a second speed governor and a discharging pump according to the run programs or the comparison result of the gray point judgment instrument and used for feeding the working parameters of the PLC cabinet back to the work station. The full automatic hydrolysis technology and equipment integrated system is set up, the labor intensity of workers is relieved, manual operation errors are reduced, and the particle size distribution of hydrolyzed metatitanic acid is stabilized further. The hydrolysis integrated system is suitable for the automatic integrated control system of sulfate process titanium dioxide production hydrolysis equipment.