Objectives : The purpose of this study was to determine new assumptive value of one Jeonsang of Jung-Kyung fomulae. Methods : Find out the Osujeon that the one money of Jangjunggyung period, and measured use Osujeon. And find out the new assumptive vaule. Results : 1) The 1 Jeonsang of Radix kansui is 0.20g. 2) The 1 Jeonsang of Gwachesan is 0.22g. 3) The 1 Jeonsang of Baegsan is 0.15g. 4) The 1 Jeonsang of Sibjotang is 0.19g. Conclusions : According to the results mentioned above, the assmumption that one Jeonsang is 1.5-2.0g is unreasonable. The assumption that one Jeonsang is 0.15-0.22g is reasonable.