The present invention provides a method for testing the water hammer strength of a glass bottle. The method includes the steps of providing a holding device on a fixing stage with a cushion material therebetween, holding the bottle filled with a content and fitted with a cap with the holding device at a position above the center of gravity thereof and suspending the bottle in the air, and dropping a weight directly or indirectly onto the cap to apply an impact to the bottle. The weight is repeatedly dropped while gradually increasing a drop energy thereof. The water hammer strength of the bottle is tested based on the drop energy of the weight at the time when the bottle is damaged.