A data driving method and a data driving device are provided. The data driving method includes: transmitting a charge sharing signal for a current data line according to a pre-stored charge sharing timing table; transmitting a valid display data for the current data line; and executing the charge sharing signal to complete a charge sharing between signal channels. The data driving device includes a timing controller, a transmission interface, a source driver, a plurality of data lines, and a charge sharing switch. The data driving method and the data driving device of the disclosure can separately set the charge sharing signal for each row by setting the charge sharing signal on each row of the valid display data through the pre-stored charge sharing timing table. This achieves independent control of charge sharing per line during display.