The present invention has been devised in view of an object of providing a method for administrating a package of shuffled playing cards to prevent fraud exchanges of cards in casinos. The administrating system 7 is programmed to calculate places and a number of all packages 2 of shuffled playing cards at each places of the backyard 8, the places of playing tables 11, places of carriers 9 and the disposition place 10 by using information obtained by the loading step and unloading step and the administrating system 7 calculates by every ID codes bases 1) places of all packages registered by the registering step for registering to a data base of administrating system 7 and each number of packages place by place from the information obtained from both the loading step and the unloading step. And then the administrating system 7 is programmed to recognize whether or not there is a lost package by comparing the information of all ID cords registered in registering step with the ID cords at each every places of all packages obtained at the calculating step from both the loading step and the unloading step and reporting about the lost package to an administrating section or to a main administration organization.