By means of spherical graphics and plane trigonometry, space angle and space point coodinates are calcullated for three sets of combined fixtures as examples.

A spherical center three surface angle can be directly built in accordance with the space angle, which makes up a spherical triangle, then the space angle can be calculated using the method of calculating the spherical triangle.

There are many methods for space angle calculation in the filed of current handwork calculation, such as hexahedron, perspective geometry etc, but most of jobs in cyber-arithmetic still need further study for these methods.

Analysis of special cases in auto-calculation for spatial angles;

Some calculation methods of spatial angles in engineering are summarized in this paper and especially programme calculation method based on new spatial angles theory and their applications in the blade design and machining are recommended .

The new method of setting-out angle calculation by Excel is discussed.