The invention discloses a method, equipment and a system for obtaining dynamic passwords to generate keys, which relates to the field of data security. The invention can ensure the privacy and the security of the information, can improve the distribution and management efficiency of key generation by dynamic passwords, and can bring the convenience for manufacturers to produce dynamic password cards. The method for obtaining dynamic passwords to generate keys provided by the embodiment of the invention comprises the following steps: generating public keys and private keys of the dynamic password cards; sending the public keys of the dynamic password cards to a certification server supporting a digital certificate issuing system; receiving digital certificates of the certification server sent by the certification server; using the private keys of the dynamic password cards to obtain the dynamic passwords from the certification server for generating the keys, and carrying out digital signature by the certification server on the keys generated through the dynamic passwords; verifying the digital signature of the keys generated through the dynamic passwords according to the obtained digital certificates of the certification server, and storing the dynamic passwords to generate the keys when the verification succeeds. The invention is applicable to occasions adopting telecommunication intelligent cards for certification of the dynamic passwords.