A simulation system for simulating a function of a biological organ using a biological model in which the function of the biological organ are represented by a mathematical model with a computer is provided. The present system receives input of time-series actual measurement data representing the biological response of a subject, estimates the biological response of the subject at a time point at which the measurement is not performed by using the input time-series actual measurement data, and generates time-series reference data representing the biological response of the subject. The present system further generates a virtual biological organ virtually constructed in a computer system using the times-series reference data. The virtual biological organ corresponds to the function of a biological organ of the subject.
