1. A control method for controlling operation of an object used by a user in an environment, said object capable of receiving signals of variable conditions which represent at least a state of the user and which are associated with operation of the object, said object capable of being programmed to behave in response to the received signals, said method comprising the steps of: defining pseudo-emotions of the object, which are elements for deciding output of the object, in relation to the signals; formulating emotion generation algorithms to establish the relationship between the signals and the pseudo-emotions; formulating behavior decision algorithms to establish the relationship between input, including the pseudo-emotions, and the behavior of the object; detecting signals of variable conditions and inputting the signals into the object; generating a pseudo-emotion of the object based on the signals using the emotion generation algorithms; making the object behave based on the signals and the pseudo-emotion using the behavior decision algorithms; evaluating reaction of the user in response to the behavior of the object; and if the reaction of the user does not match the pseudo-emotion of the object in the emotion generation algorithms, adjusting at least either of the emotion generation algorithms or the behavior decision algorithms, followed by learning the adjustment.