Exterior extended optical module heat dissipation structure and thermal adjustment method of the same

An exterior extended optical module heat dissipation structure includes a heat dissipation device. The heat dissipation device includes a thermal conductive block, a base, and a plurality of fins. The thermal conductive block, the base, and the fins are sequentially arranged along an extension direction. The thermal conductive block extends along the extension direction to abut against the base. The base includes a first surface and a second surface opposite to the first surface. The extension direction is defined as a direction progressing from the first surface to the second surface. The first surface is in contact with the thermal conductive block, and the fins are disposed on the second surface at intervals and extend along the extension direction. When the thickness of the base in the extension direction is taken as a reference length, the length of the thermal conductive block in the extension direction is 10 times of the reference length, and the height of each said fins in the extension direction is 3