A data processing apparatus for a mobile terminal, comprising: a storage unit adapted to store data of a plurality of types and an integrated data processing application; a display unit adapted to display data and screens of the integrated data processing application; an integrated data processing module adapted to select a reference date, collect pieces of data created at the reference date from the data of a plurality of types stored in the storage unit, process the collected pieces of data in an integrated manner according to preset processing conditions, and classify the collected pieces of data into groups of data on the basis of data attributes, wherein the data attributes comprise at least one of the data size, data format, and data creator; and an application management module adapted to read the integrated data processing application from the storage unit for execution, and display processing results on the display unit together with associated screens of the integrated data processing application, characterised in that the data of a plurality of types is at least one of data created by a user including individual diary entries written by a user, image data, and audio data wherein the processing conditions are at least two in number, the integrated data processing module is adapted to process pieces of data into groups of results according to each of the processing conditions, and the application management module is adapted to display the groups of results separately from each other, and wherein the groups of results include a tag cloud zone and a diary listing zone, wherein the diary listing zone includes the individual diary entries listed in order of date, and wherein the tag cloud zone includes tag clouds which include tags that are attached to the individual diary entries. a storage unit adapted to store data of a plurality of types and an integrated data processing application; a display unit adapted to display data and screens of the integrated data processing application; an integrated data processing module adapted to select a reference date, collect pieces of data created at the reference date from the data of a plurality of types stored in the storage unit, process the collected pieces of data in an integrated manner according to preset processing conditions, and classify the collected pieces of data into groups of data on the basis of data attributes, wherein the data attributes comprise at least one of the data size, data format, and data creator; and an application management module adapted to read the integrated data processing application from the storage unit for execution, and display processing results on the display unit together with associated screens of the integrated data processing application, characterised in that the data of a plurality of types is at least one of data created by a user including individual diary entries written by a user, image data, and audio data wherein the processing conditions are at least two in number, the integrated data processing module is adapted to process pieces of data into groups of results according to each of the processing conditions, and the application management module is adapted to display the groups of results separately from each other, and wherein the groups of results include a tag cloud zone and a diary listing zone, wherein the diary listing zone includes the individual diary entries listed in order of date, and wherein the tag cloud zone includes tag clouds which include tags that are attached to the individual diary entries.