The invention discloses a redundant analog parameter display system for a nuclear power plant, which is used for displaying measured values of multiple redundant analogs of at least one parameter of the nuclear power plant. The redundant analog parameter display system comprises multiple analog sensors, an effective computation module and a display module, wherein the multiple analog sensors are used for measuring the multiple redundant analogs corresponding to each parameter and transmitting the measured values; the effective computation module is connected with the multiple analog sensors and used for receiving the multiple measured values and computing one effective measured result of each parameter according to the multiple measured values and transmitting the results; the display module is connected with the effective computation module and used for displaying the effective measured result of each parameter by one display icon, and the multiple measured values transmitted by the multiple analog sensors can be inquired through the display icons. Besides, the invention discloses a redundant analog parameter display method for the nuclear power plant. With adoption of the redundant analog parameter display system and method for the nuclear power plant, information in displayed images is simplified, and monitoring load of an operator is reduced.