A method for resource mapping, wherein the method comprises: determining a unit time domain resource used for resource mapping, a length of the unit time domain resource being equal to a symbol length corresponding to a minimum subcarrier spacing in subcarrier spacings of a plurality of frequency bands, wherein one carrier for transmitting current data comprises the plurality of the frequency bands, and the subcarrier spacings of at least part of the frequency bands are different; and mapping data to resource in a plurality of unit time domain resources configured for data transmission according to an increasing order in time domain, wherein the minimum subcarrier spacing is 15 kHz, wherein the mapping data to resource in each of the plurality of unit time domain resources is performed according to a preset rule, and the preset rule comprises: mapping data to resource in the at least one time domain symbol sequentially according to an end time of the at least one time domain symbol in the plurality of frequency bands; and if the plurality of frequency bands comprise at least two time domain symbols having the same end time, mapping data to the resource in the at least two time domain symbols sequentially based on a preset subcarrier spacing order according to subcarrier spacings of frequency bands to which the at least two time domain symbols belong respectively, wherein the at least two time domain symbols belong to different frequency bands; or, if the plurality of frequency bands comprise at least two time domain symbols having the same end time, mapping data to the resource in the at least two time domain symbols based on a second frequency order according to frequencies corresponding to the frequency bands to which the at least two time domain symbols belong respectively, wherein the at least two time domain symbols belong to different frequency bands. determining a unit time domain resource used for resource mapping, a length of the unit time domain resource being equal to a symbol length corresponding to a minimum subcarrier spacing in subcarrier spacings of a plurality of frequency bands, wherein one carrier for transmitting current data comprises the plurality of the frequency bands, and the subcarrier spacings of at least part of the frequency bands are different; and mapping data to resource in a plurality of unit time domain resources configured for data transmission according to an increasing order in time domain, wherein the minimum subcarrier spacing is 15 kHz, wherein the mapping data to resource in each of the plurality of unit time domain resources is performed according to a preset rule, and the preset rule comprises: mapping data to resource in the at least one time domain symbol sequentially according to an end time of the at least one time domain symbol in the plurality of frequency bands; and if the plurality of frequency bands comprise at least two time domain symbols having the same end time, mapping data to the resource in the at least two time domain symbols sequentially based on a preset subcarrier spacing order according to subcarrier spacings of frequency bands to which the at least two time domain symbols belong respectively, wherein the at least two time domain symbols belong to different frequency bands; or, if the plurality of frequency bands comprise at least two time domain symbols having the same end time, mapping data to the resource in the at least two time domain symbols based on a second frequency order according to frequencies corresponding to the frequency bands to which the at least two time domain symbols belong respectively, wherein the at least two time domain symbols belong to different frequency bands. mapping data to resource in the at least one time domain symbol sequentially according to an end time of the at least one time domain symbol in the plurality of frequency bands; and if the plurality of frequency bands comprise at least two time domain symbols having the same end time, mapping data to the resource in the at least two time domain symbols sequentially based on a preset subcarrier spacing order according to subcarrier spacings of frequency bands to which the at least two time domain symbols belong respectively, wherein the at least two time domain symbols belong to different frequency bands; or, if the plurality of frequency bands comprise at least two time domain symbols having the same end time, mapping data to the resource in the at least two time domain symbols based on a second frequency order according to frequencies corresponding to the frequency bands to which the at least two time domain symbols belong respectively, wherein the at least two time domain symbols belong to different frequency bands.