A communication method for providing an MCS corresponding to a lower code rate, an MCS reception method, an MCS notification method, and a device are provided to better adapt to the requirements of the URLLC service. The communication method comprises the steps of determining N MCS indices from an MCS table-a value obtained by multiplying a code rate by 1024 in the first MCS table, and a value corresponding to an MCS index X of the N MCSs is less than or equal to a first threshold value. , X is an integer greater than or equal to 0, N is a positive integer, and N is greater than or equal to X -; And transmitting at least one of the N MCS indexes.
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