A device for generating handwriting information about handwriting of a user using a writing tool, the device comprising: a user interface configured to receive a user input; a signal obtainer including a camera configured to sequentially obtain an image; and at least one processor configured to obtain, using the signal obtainer , a first image of a first local writing area, which is within a predetermined range from a first writing focus, and a second image of a second local writing area, which is within a predetermined range from a second writing focus, and, in order to determine the first and the second writing focus, to trace a tip of the writing tool; and to determine a position of the tip of the writing tool; and wherein the at least one processor is configured to determine the first writing focus and the second writing focus based on the determined position of the tip of the writing tool, to obtain first handwriting from the first local writing area, to obtain second handwriting from the second local writing area, to combine the first handwriting with the second handwriting, and to generate handwriting information, based on a result of the combining, and wherein, in determining of the position of the tip of the writing tool, the at least one processor is further configured to obtain information about the shape of the tip of the writing tool from the user, to detect a tip of the writing tool from at least one of the first image of the first local writing area and the second image of the second local writing area, and to determine the position of the tip of the writing tool, based on a result of the detecting of the tip of the writing tool. a user interface configured to receive a user input; a signal obtainer including a camera configured to sequentially obtain an image; and at least one processor configured to obtain, using the signal obtainer , a first image of a first local writing area, which is within a predetermined range from a first writing focus, and a second image of a second local writing area, which is within a predetermined range from a second writing focus, and, in order to determine the first and the second writing focus, to trace a tip of the writing tool; and to determine a position of the tip of the writing tool; and wherein the at least one processor is configured to determine the first writing focus and the second writing focus based on the determined position of the tip of the writing tool, to obtain first handwriting from the first local writing area, to obtain second handwriting from the second local writing area, to combine the first handwriting with the second handwriting, and to generate handwriting information, based on a result of the combining, and wherein, in determining of the position of the tip of the writing tool, the at least one processor is further configured to obtain information about the shape of the tip of the writing tool from the user, to detect a tip of the writing tool from at least one of the first image of the first local writing area and the second image of the second local writing area, and to determine the position of the tip of the writing tool, based on a result of the detecting of the tip of the writing tool. <EOS>