The Epistle in Kezhai is one of Bronze-stone Series published by National Peking Library. It collected 58 letters from the famous epigraphy of the late Qing dynasty Wu Dacheng(Kezhai) to Chen Jieqi(Fuzhai). Ten of them referred to more than 20 ancient seals altogether. We discuss the explanations of the ancient seals, on basis of absorbing merits in this field.