A sensor event controller dynamically switches a destination to which sensor event data are to be notified, according to a service application program (AP) that a user is using,. and notifies sensor event data in compliance with an interface of the service AP as the notification destination. An information collection part stores information for identification of a service AP used on a browser and header information transmitted/received between the browser and the service AP in a collected data storage part. Upon receiving sensor event data, a data-notified application determination part decides that the service AP used on the browser is a service AP as the notification destination, by referring to the collected data storage part. A notified data conversion part converts the sensor event data so that the data are compliant with an input interface of the service AP as the notification destination, and transmits a processing request to the service AP as the notification destination, the processing request being generated by adding the header information to the converted sensor event data.