Ströher was born on September 3, 1876 in Irmenach. After attending the primary school there, he trained as a painter, first with his older brother, then in a painting company in Bernkastel-Kues . During his apprenticeship years, he developed a heart condition that has been a lifelong problem. After completing his apprenticeship, he went on a journey as a room painter from 1894, mainly in southwest Germany. During a stay in Frankfurt am Main he came into contact with socialist ideas for the first time. In the winter of 1894/95, as in the following winter, he attended the Zander painting school in Halle an der SaaleIn the summer of 1895 he was on a wandering tour in northern and central Germany. In 1896 he finally left Halle with the goal of Munich , but in the end he reached Zurich . There he attended the Zurich School of Applied Arts during the winter months , while he went hiking in the summer months. In 1897 and 1898 he traveled to Bucharest . The time in Zurich particularly shaped his political attitudes. In liberal Switzerland he came into contact with both social democratic and anarchist ideas, which led to his becoming an anarchist himself.
Finally, the planned world exhibition Ströher moved to Paris in 1899 . Here he was able to study at the Colarossi Academy , and Ströher increasingly transformed himself into an “artist” - although he had actually wanted to remain a “painter” (room painter) himself. In 1901 he traveled to Berlin for the first time, where, through Walter Leistikow , he succeeded in having his first painting exhibited by the Berlin Secession . In the years that followed, Ströher switched back and forth between Paris and Berlin several times, until he finally became a master student of Arthur Kampf from 1905was accepted at the Berlin Academy of the Arts. Between 1910 and 1912 he made three trips to southern France and Spain.
In 1917 Ströher was called up as a recruit to the Landsturm and assigned to Strasbourg as a groom. After the end of the war, he initially returned to Berlin, until after some back and forth he finally decided to settle permanently in his hometown Irmenach. In 1921 he was co-founder and board member of the Künstlerbund Westmark . He built a small house on the edge of the forest, which he and his wife Charlotte, nee. Geisler, whom he married in May 1922, related. In 1923, the couple's only child, their son Peter, was born.