A CRM server sends to a client terminal activity data that has been read
from a DB server, and directs the display thereof. When the activity data
has been received from the CRM server, a client terminal obtains the
screen data of a calendar screen is generated. Then a screen data for the
activity detail screen that displays the activity data, screen data for
an activity calendar screen is generated after display data for
displaying information about a portion of the content of the activity has
been added to screen data for a calendar screen in a field corresponding
to a date and time shown by the activity data, and these generated
screens are output on one screen.