A method for a functional and/or structural computational modeling and simulation of medical devices which are implantable or usable on patients is described. The method first comprises the steps of storing on a computer platform 1 digital modeling data D1 of medical device, adapted to model the function and/or structure and/or behavior of a medical device which is implantable or usable on a patient, referred to the whole medical device or to a part thereof; and storing in the computer platform 1 digital anatomical and/or physiological modeling data D2 of a real or virtual patient, referred to one or more anatomical parts of the patient with which the medical device is intended to interact. The method then includes providing, through the computer platform 1, a user interface 4 which can be connected to the Internet and configured to allow a user to connect and interact with the computer platform 1 of digital data and with one or more software programs included therein. The method then comprises the step of receiving selection and/or setting information I which can be entered by the user through the user interface 4. Such selection and/or setting information comprises: information (11) of selection and/or definition and/or setting of a medical device model; information (I2) of selection and/or definition and/or setting of an anatomical and/or physiological model of patient based on said stored anatomical and/or physiological modeling digital data; information (I3) of selection and setting of a simulation type, and/or information of selection and setting of one or more input simulation parameters (I4) and/or one or more output simulation parameters (I5). The method then includes processing, by means of the computer platform 1, the aforementioned information for the selection and/or definition and/or setting of a medical device model 11 to prepare a model M1 of medical device based on the aforementioned modeled digital data D1 for the functional and/or structural and/or modeling of behavior of the medical device; furthermore, by means of the computer platform 1, processing the aforementioned information for the selection and/or definition and/or setting of a patient model I2 to prepare an anatomical and/or physiological model M2 of one or more anatomical parts of the patient based on the stored anatomical and/or physiological modeling digital data D2; furthermore, by means of the computer platform, processing the aforementioned selection and/or setting information I entered by the user to prepare input setting data Din (13, 14) for one or more computational simulation software programs included in the computer platform. A step of executing the computational simulation is then provided, by the one or more computational simulation software programs, on the basis of said input setting data Din, of said medical device model M1 and of said anatomical and/or physiological model M2. Finally, the method comprises the steps of processing the data Dout obtained from the computational simulation, on the basis of the information I5 on the selection and setting of one or more simulation output parameters, to express the desired simulation results R in a format selected by the user; and providing the desired simulation results through the user interface 4.