Method and device for providing notes by using artificial intelligence-based correlation calculation

A note providing method performed in a user terminal that interworks with a note providing device, wherein the note providing device and the user terminal comprises at least one processor, the method comprising:

• receiving by the at least one processor an input of a user to create a note;
• constructing by the at least one processor a keyword database based on a keyword included in the note and a weight for the keyword by transferring the created note to the note providing device;
• extracting by the at least one processor a reference note corresponding to a browsing request of the user;
• and
• receiving by the at least one processor a plurality of target notes correlated with the reference note from the note providing device and displaying by the at least one processor the reference note and the plurality of target notes,
• wherein the displaying of the reference note and the plurality of target notes includes displaying the plurality of target notes according to ranking of correlation scores calculated for each of the plurality of target notes correlated with the reference note using the keyword database;
• and
• wherein the correlation scores are calculated by calculating a significance of a specific keyword using a number of times that the specific keyword among keywords included in the reference note is extracted from each of the plurality of target notes and a number of notes in which the specific keyword is included among a group of notes including the reference note and the plurality of target notes.