The present invention relates to a method for preparing ripe persimmon directly on a persimmon tree, comprising: a step (S1) of preparing a sealing cover a step (S2) of embedding an ethylene generating agent for generating ethylene gas in the sealing cover a step (S3) of allowing the persimmon hanging on the persimmon tree to be accommodated and sealed inside the sealing cover having the embedded ethylene generating agent a step (S4) of final ripening the persimmon inside the sealing cover over a predetermined time period to produce ripe persimmon and a step (S5) of removing the sealing cover and washing the ripe persimmon thereby preparing ripe persimmon having superior freshness and quality in a convenient and efficient manner.
