'''นครหุ่นยนต์''' (Robots and Empire)เป็นนิยายวิทยาศาสตร์ประพันธ์โดย ไอแซค อสิมอฟ ถือเป็นหนังสือเล่มที่ 4 ในชุด นักสืบหุ่นยนต์ (The Elijah Baley Detecctive Series) 

==ประวัติการตีพิมพ์==
89px|หุ่นยนต์พิทักษ์โลก: Robot and Empire
100px|นครหุ่นยนต์: Robot and Empire
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# "หุ่นยนต์พิทักษ์โลก" แปลและเรียบเรียงโดย พันธุ์ อรรณพ จัดพิมพ์โดย สำนักพิมพ์ไต้ฝุ่น ปีพ.ศ. 2533
# "นครหุ่นยนต์" แปลและเรียบเรียงโดย ระเริงชัย จัดพิมพ์โดย Science Fiction Publishing House ปีพ.ศ. 2540

==เนื้อเรื่องย่อ==

หลังการเสียชีวิตของอีไลจาห์ แบลีย์ 200 ปี มนุษย์โลกได้อพยพไปตั้งรกรากยังดาวอื่นๆ มากมาย ทำให้เขากลายเป็นวีรบุรุษและตำนานของชาวอาณานิคม    และด้วยความช่วยเหลืออย่างลับๆ ของหุ่นยนต์จิสการ์ด หุ่นยนต์ที่มีความสามารถในการอ่านใจ และชักจูงจิตใจมนุษย์ได้ ทำให้มนุษย์ขยายอาณานิคมอย่างต่อเนื่อง 

โซลาเรีย พิภพกำเนิดของเธอที่ถูกทิ้งร้าง ดานีล และ จิสการ์ด ได้ติดตามเธอไปยังโซลาเรีย  พิภพแบลีย์ และโลกมนุษย์ด้วย   

{{infobox Book | <!-- See Wikipedia:WikiProject_Novels or Wikipedia:WikiProject_Books -->
| name         = Robots and Empire
| title_orig   = 
| translator   = 
| image        = 200px
| image_caption = Cover of first edition (hardcover)
| author       = Isaac Asimov
| cover_artist = 
| country      = United States & UK
| language     = English
| series       = Robot Series
| genre        = Science fiction novel
| publisher    = Doubleday
| release_date = 1985
| media_type   = Print (Hardcover & Paperback)
| pages        = 383 pp
| isbn         = ISBN 0-385-19092-1
| preceded_by  = The Robots of Dawn
| followed_by  = Isaac Asimov's Caliban
}}
'''''Robots and Empire''''' is a 1985 science fiction novel written by Isaac Asimov. It is part of the ''Robot'' series.

This book reconciles two of Asimov's main series, the ''Robot'' series and the ''Empire'' series (continued later in the ''Foundation'' series), uniting them into a single Galactic Empire one.

==Plot summary==
Earthman Gladia who, as a Spacer, has a centuries-long lifespan as opposed to the mere decades of Earthpeople such as Baley. It is discovered that Solaria, the homeworld of Gladia had been abandoned and is in effect empty of all inhabitants, save for the millions of robots that have been left behind. She meets a seventh-generation descendant of Baley's, Daneel Giskard (or D.G.) Baley, a Settler trader, who requests Gladia's assistance in visiting Solaria to unravel the mysterious destruction of Settler ships making landings there in order to take possession of the abandoned robots.  Settlers are Earthpeople who have been colonizing other planets throughout the Milky Way Galaxy.  Gladia agrees and is accompanied by the robots R. Daneel Olivaw and R. Giskard Reventlov (who also has secret telepathic powers which only Daneel is aware of), both formerly the property of their creator, the roboticist Han Fastolfe, but willed to Gladia after Fastolfe's death. 

At the same time, Daneel and Giskard are engaged in a struggle of wits with Fastolfe's bitter archrivals, the roboticists Kelden Amadiro and Vasilia Aliena, Fastolfe's estranged daughter.  Where Fastolfe supported the expansion of the Earth-based Settler civilization, Amadiro detests Settlers (as do most Spacers, who consider Earthpeople barbarians) and wishes to see them destroyed so that the Spacers alone can inherit the Galaxy.  But for many decades Amadiro has been constantly thwarted in securing an anti-Settler policy (caused largely by Giskard's telepathic manipulation). Frustrated by his failure, Amadiro takes under his wing an ambitious protégé, Levular Mandamus, who engineers a plan to destroy Earth using a newly-developed weapon, the nuclear intensifier. They plan to make Earth uninhabitable by speeding up the otherwise slow natural radioactive decay process in the Earth's crust, thereby crippling Settler civilization.

Parallel to Amadiro's scheming, Daneel and Giskard slowly piece together the roboticist's genocidal intentions.  The robots, sharing Fastolfe's humane vision of a Settler/Spacer Galaxy (or, failing that, a Galaxy where Settlers can thrive in spite of Spacers) attempt to stop Amadiro; but Daneel and Giskard are hampered by the Three Laws of Robotics, which prevent them from making a direct attack on Amadiro.  Daneel, meanwhile, has formulated a Zeroth Law of Robotics, which he feels might help them to override the Three Laws and save Earth.  The robots must feel their way through the ramifications of the Three Laws and the Zeroth in a race against time before confronting Amadiro.  When Vasilia deduces that Giskard--whom she has long valued and wishes to take from Gladia--has telepathy, she confronts him and forces Giskard to make her forget his powers by altering her mind.  This leaves the robots free to deal with Amadiro. 