The data is from a multichannel calorimeter system, which is taken in intense laser-plasma interactions experiments. This work has been illustrated in the paper “Study of backward terahertz radiation from intense picosecond laser-solid interactions using a multichannel calorimeter system”. The data is taken to study the backward THz generation mechanism in intense laser-solid interactions using a multichannel calorimeter system. The creation method and description of the data can be find in the manuscript.STFC: Access time: experiment (App. No. 16110035) Newton China-UK joint research grant: on laser-ion acceleration and novel Terahertz radiation EPSRC grant EP/K022415/1 National Basic Research Program of China (Grants No. 2013CBA01501) National Nature Science Foundation of China (Grants No. 11520101003) National Nature Science Foundation of China (Grants No. 11535001) Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB16010200) Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB07030300) National Postdoctoral Program for Innovative Talents (Grants No. BX201600106)