A method for transmitting Channel State Information, comprising steps of: determining, by a User Equipment, a first number of bits used for a joint encoding operation on a Beam Indicator and a Rank Indicator, the BI being configured to indicate an index of a resource for transmitting a reference signal corresponding to the RI measured by the UE, an identical first number of bits being used for the joint encoding operation on RI(s) and the BI corresponding to all resources for transmitting the reference signal; and performing, by the UE, the joint encoding operation on the measured RI and the BI in accordance with the first number of bits to acquire encoded information, and transmitting the encoded information, wherein the step of determining, by the UE, the first number of bits used for the joint encoding operation on the BI and the RI comprises: determining, by the UE, numbers of bits for the RIs corresponding to all resources for transmitting the reference signal; determining, by the UE, a second number of bits for encoding the RI in accordance with a maximum value of the numbers of bits for the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the second number of bits and a number of bits corresponding to the BI, or wherein the step of determining, by the UE, the first number of bits used for the joint encoding operation on the BI and the RI comprises: determining, by the UE, a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal. determining, by a User Equipment, a first number of bits used for a joint encoding operation on a Beam Indicator and a Rank Indicator, the BI being configured to indicate an index of a resource for transmitting a reference signal corresponding to the RI measured by the UE, an identical first number of bits being used for the joint encoding operation on RI(s) and the BI corresponding to all resources for transmitting the reference signal; and performing, by the UE, the joint encoding operation on the measured RI and the BI in accordance with the first number of bits to acquire encoded information, and transmitting the encoded information, wherein the step of determining, by the UE, the first number of bits used for the joint encoding operation on the BI and the RI comprises: determining, by the UE, numbers of bits for the RIs corresponding to all resources for transmitting the reference signal; determining, by the UE, a second number of bits for encoding the RI in accordance with a maximum value of the numbers of bits for the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the second number of bits and a number of bits corresponding to the BI, or wherein the step of determining, by the UE, the first number of bits used for the joint encoding operation on the BI and the RI comprises: determining, by the UE, a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal. determining, by the UE, numbers of bits for the RIs corresponding to all resources for transmitting the reference signal; determining, by the UE, a second number of bits for encoding the RI in accordance with a maximum value of the numbers of bits for the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the second number of bits and a number of bits corresponding to the BI, or wherein the step of determining, by the UE, the first number of bits used for the joint encoding operation on the BI and the RI comprises: determining, by the UE, a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal. determining, by the UE, a total number of possible values of the RIs corresponding to all resources for transmitting the reference signal; and determining, by the UE, the first number of bits in accordance with the total number of the possible values of the RIs corresponding to all resources for transmitting the reference signal.