1. An apparatus including a memory and computer processor for automatically generating a visual annotation based on a visual language, the apparatus comprising: image input instructions configured to, using the processor, receive an input image; image analyzing instructions configured to extract feature information of the input image received by the image input instructions; searching instructions configured to, using a processor, receive feature information of images included in an image and metadata database (DB), compare the feature information of the input image with the feature information of the images included in the image and metadata DB to select a similar image with respect to the input image, set a candidate group by using text information of the similar image, and select text information having frequency equal to or higher than pre-set frequency among a plurality of text information included in the candidate group, as text information for the input image; and visual annotation instructions configured to, using a processor, generate a keyword list by analyzing the text information for the input image selected by the searching instructions, and generate the visual annotation as at least one sentence expressing contents included in the input image with respect to at least one of a plurality of objects included in the input image by semantically analyzing the text information in the keyword list.