A novel polyhedral net space capture mechanism for space service is proposed in the paper. The capture mechanism consists of a 3-RRS parallel mechanism (a spatial mechanism with 3-DOF) as the main body and a Bricard linkage (a spatial single closed-loop six-bar mechanism with 1-DOF) as the moving platform. Through the folding motion of the Bricard linkage and the shrinking motion of the main body, the mechanism can capture the target in space and adjust its position and posture. The capture process is verified by the simulation in ADAMS. Based on the joint stress from the simulation, the strength analysis and thermal balance analysis of the proposed polyhedral net space capture mechanism are conducted in ANSYS and I-DEAS, which ensure the mechanical strength and thermal adaptability of the mechanism can meet the requirements of actual application. It is shown by the results of theoretical analysis and simulation experiment that the mechanism can meet the requirement of space target capture tasks.