To provide a thermoelectric consumption predicting system for optimizing energy efficiency of an energy plant, without making the system complex in configuration.

This thermoelectric consumption predicting system determines an operation schedule in an energy plant for supplying either of heat and power to at least one supply target of heat and power and is provided with a communication device 1 for reading weather-related data from the outside and an operation device 2 for outputting an least one of a heat consumption prediction value and a power consumption prediction value, based on weather data read from a communication device 1.