This invention provides an output service provision system which is
capable of allowing a user to easily receive a provided output service,
providing an output service responsive to the user and flexibly coping
with situational variations. Upon determining that a virtual object B is
in an area-in state with respect to a virtual object A, a virtual object
management device can transmit an area-in notification to a projector.
Upon receiving the area-in notification, the projector can transmit a
projector display data transmission request to a portable terminal and
receive projector display data transmitted in response to the
transmission request. The projector can then execute a projection process
by a projection device on the basis of the received projector display
data. The portable terminal can transmit the projector display data to
the projector in response to the projector display data transmission
request.