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.