Is operation the only option for deep vein thrombosis with pulmonory embolism?

Depends. Surgical treatment is usually reserved for massive pulmonary embolism (pe) or in chronic pe cases. In most instances DVT and pe are treated with clot dissolving drugs (thrombolysis) and blood thinners (anticoagulation). Sometimes DVT is treated "invasively" by an interventional radiologist to help direct the therapy to the clot directly.
Treatment DVT and PE. Operation is not the only option for DVT and PE and is usually NOT an option. Most DVT/PE is treated by anticoagulation. Some extensive DVT is treated by clot desolving through a process called lysis using "clot busters". Life threatening PE may be treated by surgery but this is only in an extreme circumstance. Most DVT and PE are treated by medical means.