Having trouble controlling 3 Row Seven Segment with 4 shift register 74hc595

zifank:
the result is it's brighter than I use under 9volt

The only way to supply power to the board is through the connector. The connector supplies power to the 74hc595 chips directly. The maximum voltage of those chips is 6V. By connecting a 9V supply, you may have damaged the chips. If you want my continued help, explain what else you have done that you have not already described. I do not wish to waste my time writing code for a board that is already damaged.