A state transition management device includes a first terminal receiving a first signal based on a current state-number, a memory which stores a state transition rule and from which a plurality of subsequent state-number candidates are read out in accordance with the first signal, a plurality of first nodes revealing the plurality of subsequent state-number candidates, a second terminal receiving a second signal based on the current state-number, a selection method specifying unit which outputs a selection method specifying signal in accordance with the second signal, a second node revealing the selection method specifying signal, a event terminal receiving a event-signal based on an event, a third terminal receiving a third signal based on the current state-number, a selection circuit which selects a subsequent state-number from the plurality of subsequent number candidates in accordance with the event-signal and the third signal.