NOVELTY - The system has a main operation system (2) and a supporting system that is provided in the main operation system having a transversal template (2'). A subsystem is provided for collector geometry and mirror position measurement and provided in the main operation system. A supporting system (6) for the collector torque tube or the torque box is located at a centered position of the assembly gantry. A data processing apparatus is configured to control the movement of the assembly gantry and to calculate the optical parameters of the solar collector.    USE - Assembly system for solar collector e.g. parabolic trough collector or heliostat used in sun concentration technologies such as thermoelectric solar power plant. Can also be used in concentrated photovoltaic technology, water treatment and photochemical reactor or steam generator.    ADVANTAGE - The relative displacement between the element to be assembled and the main operation system that maintains the preset assembly references is achieved, since the data processing apparatus is configured to control the movement of the assembly gantry and to calculate optical parameters of the solar collector. The direct measurement on the surface of the assembled mirrors is performed continuously along the entire module to provide data enough to control the position of components and calculate the optical performance of the module. The surfaces and reflective surfaces of solar collector are correctly placed in grid or metallic support by assembly system, so that the position of surface and tilt is measured and recorded. The higher solar field performance can be achieved in low assembly time with high production capacity. The high precision assembly of large solar plants is achieved for energy production plants by parabolic trough collectors or heliostats and central receptor systems.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for assembling solar collector as parabolic trough collector or heliostat.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the elements of the assembly system.    Main operation system (2)    Transversal template (2')    Supporting system (6)    Induced arrow system (7)