Feature construction method in information click prediction and information serving method and device

The invention discloses a feature construction method in information click prediction and an information serving method and device. The feature construction method comprises the steps that user behavior data is acquired, and information click behavior user data is obtained through the user behavior data; the information click behavior user data is loaded for model training to obtain two or more tree models; features, corresponding to each tree model, of the user behavior data are obtained through the corresponding tree model, and the features corresponding to all the tree models form user feature vectors; and the user feature vectors are stored, and the user feature vectors are used for information click prediction of corresponding users. The user feature vectors are used for information click prediction of the corresponding users, the process does not need to depend on manual work to be realized, and instead the corresponding features are obtained through model automatic learning. Inthis way, manpower is sav