The first question that everyone asks when hears about traveling to Iran is around safety (Iran? Is it safe?). Lonely planet says about this question the perception of Iran as an unpredictable, dangerous destination couldn't be further from the truth. Violent crime against foreigners is almost unheard of, and the idea that as a Westerner you won’t be welcome is plain wrong. If you do your best to fit in with local customs. You are unlikely to be treated with anything but courtesy and friendliness that applies to Americans too. Of course, crime does still exist in Iran, so it pays to take the usual precautions, though, in fairness, we’ve heard of very few travelers being robbed. When traveling long distances by public transport, especially on international services, keep your passport, money, and camera with you at all times. The occasional pickpocket operates in some crowded bazaars.
So as this great traveling book says Travel to Iran is not dangerous. Maybe you have the face of all middle east countries about Iran, and you think your life is in going to danger if you travel to the land that is afoul of war. The good news of Iran is not involved in any wars around the world. It is like apple and orange, but do you ignore traveling to France because they had a revolution a long time ago, or Do not travel to Spain because its southern neighbors are afoul of war.
Fortunately, in Iran, you will welcome delicious food, lovely soft drinks, and the kindness of people. If you Travel to Iran legal you are under the protection of Iran's Police, so you do haven't to worry about anything. Just choose your accommodation at the places confirmed by Iran's government, choose the confirmed travel agency or tour operator.