The content is about the "Ultra Guard" (ウルトラ警備隊) that protects the Earth from space invaders, and the active story of the hero "Ultraman 7" who assists the Earthlings. This film is planned as the fourth work in the ULTRA series (the third work is "CAPTAIN ULTRA" produced by Toei). Like "Ultraman", it adopts the model of "a special team fighting for human peace and a giant superhero who assists them". However, the world view is completely different from "Ultraman" and "Ultraman". First of all, the world view that the Earth has become the target of many alien attacks due to the invasion war between the stars has been added. As a result, a world-scale military organization such as the "Earth Defense Force" has been introduced. There are also many descriptions of espionage wars with hostile cosmic people in the play, which makes the work present a strong military color, and the process of super weapons being deployed in the special effects scenes is also the same. These settings will also broadcast the background of the Cold War at the time, especially the Vietnam War. In addition, the story of each episode also attaches great importance to drama. For example, the question "Are the people of Earth the descendants of invaders who invaded Earth in the past?" was raised, which shook the protagonist's belief in justice from the bottom of his heart. The 26th episode "Super Weapon R1" criticized the arms expansion race through the tragedy of the space monsters who became victims of the Earth Defense Force's new weapon experiment. These works have become works with heavy propositions beyond the scope of entertainment works. The characteristics of the aliens and monsters are so strong that the individual characters have become diluted. There are even examples in the play where their names do not appear. This is also obviously different from "Ultraman", which emphasizes the characteristics of the monsters and announces the names of the monsters in the opening screen. On the other hand, the heroic characteristics of the protagonist Ultraman No. 7, who has more diverse superpowers than Ultraman, as well as the battle scenes with various styles ranging from hardcore to humorous, and the refreshing activities of the Super Guard, fully pursue the entertainment value for the main target audience of children, and ensure that this film has a solid position as a first-line work in the superhero drama series with family viewing orientation. According to Mitsuda [Hesai], one of the main directors who inspired the whole series, "Including the strong SF color and the increase in the age of the audience, we deliberately highlighted the difference with Ultraman in all aspects." [1] In the production of this film, based on the lessons learned from the deterioration of the production schedule of Ultraman, which had to be cancelled, the budget and other conditions were strictly controlled, and the production system was re-strengthened. In addition to trying to rationalize the shooting site, archive the special effects scenes, and use existing daily necessities to make props, in terms of the plot, we also put a lot of effort into not appearing in the story of monsters and non-human aliens. However, the entertainment value that attracted many viewers was no longer there, and the ratings of the later programs showed a downward trend as the monster craze declined. "Ultraman 7" finally put an end to the ULTRA series since "Mystery of the Super Anomaly" and "Ultraman". However, without any major changes in the route and the consistent vein, the final episode that led the story to a larger pattern was highly praised. After many rebroadcasts, the charm of the film mentioned above also opened up a new group of fans. Therefore, the view that this film and "Ultraman" are representative popular works of the Ultraman series began to be widely recognized, which greatly contributed to the birth of the second Ultraman series and the re-evaluation of Japanese special effects heroes in the late 1970s. To this day, this film is still extremely popular in the series (including the cast and crew who have expressed their views that this film is the highest masterpiece of the Ultraman series). In the "DIGITAL ULTRA SERIES" (デジタルウルトラシリーズ) that DVDs past Tsuburaya works, this film has become the first wave of main works before "Mystery of the Super Vision" and "Ultraman". Today, 40 years after the first broadcast, satellite channels and wireless channels are still frequently rebroadcasting. In addition, this film has also produced a sequel OV and TV special works that inherit the world view.