Disclosed by the present invention are a bone age assessment and height prediction model, a system thereof and a prediction method therefor, the bone age assessment and height prediction system comprising an image capturing unit and a non-transitory machine readable medium. The image capturing unit is used to acquire target hand bone X-ray image data of a subject. The non-transitory machine readable medium is used for storing a program, and is used for determining the hand bone development status and bone age of the subject and predicting the adult height of the subject when the program is executed by a processing unit. Thus, the bone age assessment and height prediction system of the present invention may effectively improve the accuracy and sensitivity of bone age assessment and height prediction, and may shorten the determination time for bone age assessment and height prediction.