The invention provides a nuclear power turbine generator set speed regulating system modeling signal acquisition device and method. The device includes a signal point selecting module for determining signal points required to be acquired by speed regulating system modeling parameters, a configuration module used for configuring a temporary sensor to acquire operation parameters, a signal acquisition assembly used for acquiring operation parameters, a DCS channel module used for processing and transmitting operation parameters, and a signal analysis recorder used for carrying out modeling for a nuclear power turbine generator set speed regulating system according to output signals and carrying out display. According to the device and method of the invention, an existing DCS sensor of a nuclear power plant is adopted, the use of temporary devices and a large amount of hard wiring in complicated on-site environments can be avoided, cost can be controlled, signal acquisition accuracy can be improved; and signals can be effectively acquired and transmitted to the signal analysis recorder through a DCS special signal processing channel, and therefore, the stability of the signals can be ensured.