Harmony and harmony are combined into one word. Is it Taoist calligraphy?

No. Belong to folk figures. "Blue sky" is the sky, "infinity" is long, "landscape soil" is the land, and "years" is a long time. It is the same as folk Chinese characters such as "the way to make money".

The word appeared on the lintel of an ancient residence in Wuyuan, Jiangxi: